2008 Laboratory Essentials

FREE
Science
Gift Pack
(see page 4)
2008 Laboratory Essentials
dynalabcorp.com

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For additional information call 800.828.6595
Technical Plastic Properties
Introduction
The Dynalab Corp. Laboratory Essentials catalog technical section aims to provide clear, con-
cise information about the key polymers from which the Dynalab range is manufactured. It is
intended as your guide to the suitability of our products for use with a variety of chemical
groups, and in a variety of environments. Each polymer has its own entry with detailed tech-
nical information and a summary icon denoting its general chemical suitability characteristics.
Those Polymers capable of being repeatedly Autoclaved at, at least 121°C for 30 minutes are
denoted by the letter A. More detailed temperature resistance is often included in the text.
The information within this section is designed to answer most common application ques-
tions, but like any guide will not answer all. Dynalab's Technical Department (800.828.6595)
will be pleased to answer any question relating to our product usage.
Key to Summary Icons
These 'Summary Icons' are intended to give a quick guide to the chemical resistance of the polymers.
Exceptional resistance to almost all
Moderate to good resistance to common
laboratory chemicals.
aqueous laboratory chemicals but avoid
organic solvents and strong acids and
Good to excellent chemical
bases.
resistance across a broad range of
common laboratory chemicals.
A Autoclavable.
Note: Where no icon is shown, product is manufactured from several materials. Refer to text for
component's resistance.
Sterilization
Reference to methods of sterilization are based on the following standards:
Autoclaving 121°C, 15 psi for 30 minutes.
Gas-Ethylene oxide formaldehyde.
When autoclaving, always ensure caps are
loosened or removed to prevent accidental
Dry heat 160°C, 120 minutes.
implosion. Certain chemicals which have no
appreciable effect on resins at room tempera-
Disinfectants - Benzalkonium chloride,
ture may cause deterioration at autoclaving
formalin, ethanol, etc.
temperatures unless removed with distilled
water before hand.
Radiation - gamma irradiation at 2.5 (Mrad)
with unstabilized plastic.
Note: Sterilizing reduces the mechanical strength of certain polymers.
Chemical Resistance and Physical Properties
These codes are used in the following charts.
Excellent resistance,
Good resistance,
Limited resistance,
no attack.
minor attack.
moderate attack, suitable
for short term use only.
Poor resistance,
No information
–
not recommended.
available.
Transparency
Flexibility
C
Clear
TL
Translucent
O
Opaque
EX
Excellent
R
Rigid

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Specify Dynalon product numbers from your distributor of choice.
Technical Plastic Properties
Low Density Polyethylene (LDPE)
The first of the polyolefins originally prepared some fifty years ago by the high pressure polymerization of ethylene. Its comparatively low
density arises from the presence of a small amount of branching in the chain (on about 2% of the carbon atoms). This gives a more open
structure. LDPE is a most useful and widely used plastic. It is translucent to opaque, robust enough to be virtually unbreakable and at the
same time quite flexible. Chemically LDPE is unreactive at room temperature although it is slowly attacked by strong oxidizing agents and
some solvents will cause softening or swelling. It may be used at temperatures up to 95°C for short periods and at 80°C continuously. LDPE
is ideally suited for a wide range of laboratory apparatus including wash bottles, pipette washing equipment and tanks.
LDPE
High Density Polyethylene (HDPE)
A linear polymer prepared from ethylene by a catalytic process. The absence of branching results in a more closely packed structure with a
higher density and somewhat higher chemical resistance than LDPE. It is also somewhat harder and more opaque and it can withstand rather
higher temperatures (120°C for short periods, 110°C continuously). It lends itself particularly well to blow molding, e.g. for bottles and con-
tainers.
A
Polypropylene (PP)
HDPE
A polymer prepared catalytically from propylene which differs from HDPE by having an isostatic replacement of a hydrogen atom by a methyl
group on alternate carbon atoms in the main chain. Although largely unreactive chemically the presence of the methyl groups makes it
slightly more susceptible to attack by strong oxidizing agents than HDPE. A major advantage is its higher temperature resistance. It makes
it particularly suitable for items such as trays and instrument jars that have to be sterilized frequently for use in a clinical environment. PP is
a translucent material with excellent mechanical properties and it has gradually replaced the polyethylenes for many purposes
A
Polymethylpentene (PMP or 'TPX'*)
PP
A polymer of 4-methylpentene- 1 which is similar to PP but has an isobutyl group in place of methyl group on alternate C atoms. The impor-
tant qualities of PMP ("TPX") as a laboratory plastic are its high transparency, its rigidity and resistance to impact and its ability to withstand
temperatures of up to 200°C for short periods (180°C continuously). It is particularly suitable for volumetric apparatus such as flasks, measur-
ing cylinders and beakers. Like other polyolefins PMP ("TPX") is susceptible to attack by strong oxidizing agents over a period of time and some
chlorinated solvents (e.g. trichloroethylene) can cause some softening and swelling. *"TPX" is a trademark of Mitsui Petrochemicals Ltd.
Polyvinylchloride (PVC)
PVC has a linear structure similar to polyethylene but with a chlorine atom replacing a hydrogen atom on alternate carbon atoms. PVC itself
PMP
is hard and rigid but the addition of phthalate esters as plasticizers makes it soft and pliable and ideal for tubing. The material is generally
transparent with a bluish tint. It is attacked by many organic solvents but it has a very good resistance to oils and it has a low permeability
to gases. In its rigid form PVC is available in sheets which can readily be welded to produce tanks, trays and troughs. It is not recommend-
ed for use above 70°C although it can be taken to 80°C for short periods.
A
Polycarbonate (PC)
PC is a linear polycarbonic acid ester prepared from a dihydric phenol. It possesses extraordinarily good dimensional stability with a high
PVC
impact strength which is maintained over a wide temperature range. This makes it ideal for the manufacture of laboratory safety shields,
vacuum desiccators and centrifuge tubes. PC may be autoclaved (maximum continuous working temperature 130°C, and 140°C for short
periods), but some loss in mechanical strength occurs on repeated autoclaving and the equipment should not then be used for vacuum
applications. The carbonate linkages in the chain make the material subject to reaction with a variety of concentrated acids and bases and
it is soluble in various organic solvents.
Polystyrene (PS)
A hard rigid, transparent plastic with good dimensional stability. The material has good chemical resistance to many aqueous solutions but
PC
it is soluble in many aromatic and halogenated solvents. It cannot be used at elevated temperatures (maximum 60°C continuous, 70°C for
short periods) and it tends to suffer from mechanical stress. It finds a wide use in disposable laboratory products. The chemical resistance
to non-polar solvents and aromatics can be improved by co-polymerizing styrene with acrylontrile (CH2 = CH. CN). The resultant product
SAN usually contains 25-35% of acrylonitrile by weight. SAN also has an improved impact strength and rigidity and is much used for injec-
tion molded articles such as boxes and food containers.An acrylonitrile - butadiene - styrene (ABS) graft copolymer is obtained by polymer-
izing acrylonitrile and styrene in the presence of soluble polybutadiene ([CH2-CH =CH-2]n). The physical properties of the product may be
varied by changing the individual proportions. The polymer has a higher chemical resistance than PS and it will retain its stability of shape
up to 100°C.
PS
3

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For additional information call 800.334.7585
Technical Plastic Properties
Polymethylmethacrylate (ACRYLIC)
A rigid plastic with a high degree of transparency. It is resistant to inorganic acids and alkalis but is attacked by a wide range of organic sol-
vents. Its clarity and stability make it very suitable for the manufacture of burets and in sheet form it may be cemented to produce tanks,
trays, etc. ACRYLIC may be used at temperatures up to 70°C continuously and to 90°C for short periods. 10mm thick Acrylic provides an
effective barrier to Beta radiation.
ACRYLIC
A
Polytetrafluoroethylene (PTFE)
PTFE shows a remarkable chemical resistance and it is insoluble in all known solvents. It is attacked only by molten alkali metals and by flu-
orine at high temperatures. PTFE is incombustible and may be used up to 260°C (300°C for short periods). Its coefficient of friction is
extremely low and it shows the effect of self lubrication with constant mechanical properties which makes it particularly suitable for bear-
ings, joints, O-rings, stirring bars, etc. It may be shaped by compression and sintering into bottles and beakers where its chemical stability
and non-wettability make it suitable for use in extreme circumstances.
PTFE
A
Perfluoroalkoxy PTFE (PFA)
PFA is a copolymer of tetrafluoroethylene (CF2 = CF2) with a perfluoroalkyl vinyl ether [F(CF2)m CF20CF = CF2]. The resultant polymer con-
tains the carbon-fluorine backbone chain typical of PTFE with perfluoroalkoxy side chains. The mechanical, chemical and physical properties
are fundamentally attributable to the main chain and the chief effect of the side chains is to control the crystallinity of the polymer. Unlike
PTFE the new polymer does not require special fabricating techniques. It has outstanding chemical and solvent resistance over a tempera-
ture range even greater than PTFE (p.e. - 270° to + 260°C). PFA has extremely low absorption and permeability levels even at 200°C which
make it very suitable for trace element analysis, isotopic separations, sample digestions and the handling of sensitive biological solutions.
The material is translucent but liquid levels can easily by seen. In short PFA approximates closely (and in some cases exceeds) the overall
PFA
properties of PTFE while offering the flexibility of thermoplastic processing. FEP exhibits similar properties but is also susceptible to attack
by concentrated perchloric acid.
Synthetic rubbers and other 0-ring and gasket materials
Synthetic rubbers are based mainly on polymers and co-polymers of butadiene and its derivatives.
SILESCOL®
Neoprene
A polymer of chloroprene (2-chlorobutadiene) i.e. CH2 = CH - CCI = CH2. This material has a better oil resistance than natural rubber. The
presence of chlorine deactivates the C-C bond and makes it less susceptible to oxidative attack as well as increasing its resistance to sol-
vents. It has a higher temperature and fire resistance than natural rubber.
Nitrile Rubber
A co-polymer of acrylonitrile (CH2 = CHCN) and butadiene, (CH2 = CH - CH = CH2). It has a good solvent resistance increasing with increas-
ing acrylonitrile. Good for gaskets, oil and petrol hoses.
Viton A
A co-polymer of perfluoropropene (CF3CF = CF2) and vinyledene fluoride (CH2 = CF2). It is resistant to chemical and solvents up to 200°C
and is used for 0-rings, gaskets and hose linings.
FREE Science Gift Pack
Containing items such as bottles, cylinders, funnels & stir bars!
Tel: 800.334.7585 Fax: 585.334.0241 E-mail: dynaloninfo@dyna-labware.com
The information contained within this catalog is offered for use by technically qualified personnel at their discretion and risk. All technical statements, informa-
tion and recommendations contained herein are based on tests and data we believe to be reliable, but the accuracy or completeness thereof is not guaranteed
and no warranty of any kind is made with respect thereto. We recommend that users satisfy themselves as to the compatibility between contents and contain-
ers or substances and apparatus before use. Dimensions given throughout this catalog are nominal unless otherwise stated. Shipping weights are provided when
available. Please telephone customer service for any weights that are not printed in this book. Dynalon reserves the right to alter specifications without notice
as part of the company's policy of ongoing product improvement.
4

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Specify Dynalon product numbers from your distributor of choice.
ACRY-
LDPE
HDPE
PP
PS
LIC
PTFE
PMP
PVC
PC
PFA
Acids - dilute
Acids - concentrated
Alcohols
Aldehydes
Bases
Esters
Hydrocarbons
Aliphatic
Hydrocarbons
Aromatics
Hydrocarbons
Halogenated
Ketones
Oils, Minerals
Oil, Vegetable
Oxidizing Agents
Max Temp. °C
80
120
135
70
90
280
180
70
130
270
Min Temp.°C -50
-100
0
-10
-60
-200
0
-25
-135
-260
Autoclavable NO
NO
YES
NO
NO
YES
YES
NO
YES
YES
Gas Sterilization YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Dry Heat
Sterilization NO
NO
NO
NO
NO
YES
YES
NO
NO
YES
Gamma Irradiation
Sterilization YES
YES
NO
YES
YES
NO
YES
NO
YES
YES
Chemical Disinfectant
Sterilization YES
YES
YES
NO
NO
YES
YES
YES
YES
YES
Transparency
TL
TL
TL
C
C
O
C
C
C
TL
Flexibility
EX
R
R
R
R
R
R
R
R
F
Gas
Permeability N2 20
3
4.4
3
-
-
65
0.4
3
-
Gas
Permeability CO2 280
45
92
75
-
-
-
10.2
85
-
Gas
Permeability O2 60
10
28
15
-
-
270
1.2
20
-
Water Absorption % <0.01
<0.01
<0.02
0.05
0.3
0.3
<0.01
0.06
0.35
<0.03
Resistivity Ohm CM2 >1015
>1015
>1016
>1016
>1014
>1018
>1016
<1016
2X1016
1018
Specific Gravity
0.92
0.95
0.90
1.05
1.18
2.2
0.83
1.34
1.20
2.16
5

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For additional information call 800.334.7585
Technical Plastic Properties
Excellent resistance
Good resistance
Limited resistance
Poor resistance, attacked or
No information
no attack
minor attack
moderate attack
dissolved, not recommended
available
Reagent
LDPE
HDPE
PP
PMP
PVC
PC
PS
SAN
ABS
ACRYLIC PTFE
PFA
E-CTFE
Temperature °C
20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50
Temperature °F
68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122
Acetaldehyde








Acetic Acid








Acetic Anhydride










Acetone











Acetyl Chloride













Ammonium Chloride (10%)













Ammonium Hydroxide (28%)













Amyl Acetate












Aniline










Aqua Regia







Benzaldehyde









Benzene










Benzoic Acid












Boric Acid (10%)













Bromine Gas (Dry)










Bromine Water









Butyl Acetate









Butyl Alcohol











Butyric Acid









Calium Hydroxide (Saturated)












Carbon Disulphide












Carbon Tetrachloride









Chlorine Gas (Dry)









Chlorine Water









Chloroform












Citric Acid













m-Cresol












Cyclohexane










Dibutylphthalate











p-Dichlorobenzene








Diethyl Ether










Diethylene Glycol











Dimethyl Formamide












Dioxane










Ethyl Acetate













Ethyl Alcohol











Ethyl Chloride












Ethylene Chloride










Ethyl Oxide











Fluorine Gas (Dry)












Formaldehyde (Formalin)










Formic Acid










Fuel Oil









This chart gives general guidelines only on the chemical resistance of plastics. There are many factors which influence chemical resistance - always test
for your own application before selecting the appropriate product. If you have any doubts, please contact our Technical Department for advice.
6

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Specify Dynalon product numbers from your distributor of choice.
Technical Plastic Properties
Excellent resistance
Good resistance
Limited resistance
Poor resistance, attacked or
No information
no attack
minor attack
moderate attack
dissolved, not recommended
available
Reagent
LDPE
HDPE
PP
PMP
PVC
PC
PS
SAN
ABS
ACRYLIC PTFE
PFA
E-CTFE
Temperature °C
20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50 20 50
Temperature °F
68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122 68 122
Glycerine (Glycerol)













Hexane






Hydrobromic Acid (25%)












Hydrobromic Acid (35%)









Hydrofluoric Acid (35%)










Hydrogen Peroxide (30%)












Lactic Acid












Methyl Acetate













Methyl Alcohol










Methyl Ethyl Ketone










Methylene Chloride









Mineral Oil












Napthalene










Nitric Acid (10%)












Nitric Acid (70%)









Nitrobenxene












Oleum












Oxalic Acid












Perchloric Acid (20%)











Petrol





Petroleum Ether








Phosphoric Acid (85%)












Photographic Developer













Photographic Fixer













Potassium Hydroxide (50%)












Potassium Permanganate (20%)













Propylene Glycol











Pyridine













Salicylic Acid












Silver Nitrate











Sodium Hydroxide (50%)













Sodium Hypochlorite (20%)












Sodium Thiosulphate











Sulphuric Acid (10%)












Sulphuric Acid (98%)











Tetrahydrofuran












Tetrahydronaphthalene











Thionyl Chloride












Toluene












Trichloroethylene











Turpentine










Vegetable Oil









Xylene











This chart gives general guidelines only on the chemical resistance of plastics. There are many factors which influence chemical resistance - always test
for your own application before selecting the appropriate product. If you have any doubts, please contact our Technical Department for advice.
7

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For additional information call 800.334.7585
Science Equipment
THE
Colony Counter, SC6
BENCHTOP
EQUIPMENT
HYGIENE
SOLUTION
• Pressure sensitive count system.
• Can be used with any probe or felt tip pen.
• Digital readout from 0 to 999.
• Built-in average count facility.
• Audible confirmation of each count.
• Choice of light or dark background.
Ideal for all microbiology applications, the SC6/120V/60 colony counter pro-
vides fast and accurate counting of bacterial and mold colonies. The
SC6/120V/60 colony counter is easy to use. Simply place the Petri dish on the
electronic pressure pad and touch the dish with a felt tip pen to mark each
colony. The touch pressure causes a count to be registered on the digital dis-
play and an audible tone confirms each count made (the sound can be
switched on/off as desired).
Any suitable implement - a felt tip pen for example may be used to apply pres-
sure to the dish. The sensitivity required to register a count can be adjusted to
suit with an easy to use dial. This unit can also be used to count multiple plates,
and then calculate the average colony count via the built-in averaging facility.
A choice of either white or black background on which to view colonies is avail-
able. The black background aids the viewing of difficult, translucent colonies.
Two dish centering adapters are provided to enable the use of standard Petri
dishes. In addition, the receiver dish may be easily removed for cleaning.
This colony counter is supplied complete with one Wolffhuegel graticule, one
segmentation disc and two centering adapters for standard Petri dishes. A
choice of magnifiers is available to aid easier counting of smaller colonies.
Unit is sold as base only. Separate magnifiers can be purchased below
under SC6/1 (1.7X) and SC6/1/3 (3X).
Technical Specification
Digital display
3 digit LED
Count
0 to 999
Dish size
50 to 100mm
Max plate number to average
99
Dimensions (w x d x h)
310 x 300 x 140mm
12.2” x 11.8” x 5.5”
Net weight
4lbs
Electrical supply
120V, 60Hz
Ordering Information
Model
Description
Price
SC6/120V/60
Colony counter
$659.08 each
SC6/1
1.7x magnifier
$65.60 each
SC6/1/3
3x magnifier
$78.67 each
SC6/2
Wolffhuegel graticule and
segmentation discs
$30.08 pk 10
SC6/3
Spare dish centering adapters
$12.04 pk 2
SC6/4
Clear protective discs
$24.60 pk 5
SC6/5
Spare receiver dish
$8.46 each
8

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Specify Dynalon product numbers from your distributor of choice.
Science Equipment
Digital Melting Point Apparatus
THE
BENCHTOP
EQUIPMENT
HYGIENE
SOLUTION
• Simple and safe to operate
• Fast, accurate results
• Easy to clean
• Economical price
No Mercury
• Digital display of temperature
thermometer!
The SMP10/120V/60 has been designed with safety and ease of operation in
mind making it ideal for use in education. The temperature is selected, meas-
ured and displayed digitally making it accurate and negating the need for a
thermometer.
Two samples can be tested simultaneously. They are viewed via a magnifying
lens with clear observation aided by built in illumination. Extendible back feet
allow the unit to be operated at the optimum viewing angle. Full access to the
block aids cleaning.
The simple to follow instructions are printed on supplied clear labels in most
European languages for ease of use. To operate simply select a plateau temper-
ature via the three digit display and press ‘start’. The unit quickly heats up and
remains at the selected plateau temperature until the user is ready to start the
test. Insert the sample tubes and press ‘start’. The unit then heats slowly so that
the melt can be observed. When the sample is seen to melt, note the temper-
ature on the display. Press ‘stop’ to end heating and cool the block.
Supplied complete with calibration certificate showing individual serial number
for traceability.
Technical Specification
Number of samples
2
Temperature range
Ambient to 300°C
Temperature accuracy
± 1.0°C at 20°C
± 2.5°C at 300°C
Display
Three digit LED
Display resolution
1ºC
Sensor
Platinum resistance PT100
Ramp rates
20°C per minute to plateau
2°C per minute to melt
Dimensions (w x d x h)
160 x 220 x 170mm
6.3” x 8.6” x 6.7”
Net weight
4lbs
Electrical supply
120V, 60Hz
Ordering Information
Model
Description
Price
SMP10/120V/60 Melting point apparatus,
complete with pack of
100 melting point tubes,
closed at one end.
$896.88 each
SMP10/1
Glass melting point tubes,
$19.56 pk 100
9

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For additional information call 800.334.7585
Science Equipment
THE
Analogue Melting Point Apparatus
BENCHTOP
EQUIPMENT
HYGIENE
SOLUTION
• Easy to operate - ideal for educational use
• Supplied with safe spirit filled thermometer
• Economical price
The SMP11 measures the melting point of chemicals from ambient to 250°C.
Samples need to be placed in a sealed end capillary tube and located in the heating
block. Up to three tubes can be tested at one time. The heating
rate can be adjusted manually between 20°C/min, for rapid
heating and 1°C/min, to obtain an accurate melting point
range.
The sample and melt process can be viewed via the magnify-
ing lens, which is illuminated by bright LED's. Record the
melt temperatures from the thermometer, positioned hori-
zontal to the samples to allow simultaneous viewing. The ther-
mometer is filled with low toxic spirit making it completely safe
in the event of a breakage. The lens can be detached for cleaning
and simple to follow instructions are printed directly onto the unit,
making it very easy for students to use.
Safer, easy to use
No Mercury
thermometer
Technical Specification
No. of samples
3
Maximum temperature
Ambient to 250°C
Heating rate
1 to 200C/min
Dimensions (w x d x h)
370 x 140 x 110 mm
14.6” x 5.5” x 4.3”
Net weight
4lbs
Electrical supply
120V, 60Hz
Ordering Information
Model
Description
Price
SMP11/120V/60s
Melting point Apparatus, complete
with thermometer and pack of 100
melting point tubes (open both ends)
$813.85 each
SMP11/1
Spare thermometer, spirit filled,
0°C to 250°C
$45.87 each
SMP1/2
Cooling plug (brass) for rapidly reducing
heating block temperature after use
$17.43 each
Melting point tubes
Made from soda glass, these tubes are easy to seal in a Bunsen flame and break into
two. Supplied in robust tube holder, pack of 100 tubes. Tube overall length is
100mm Tube diameter = 1.9mm, inner diameter = 1.3mm and wall thickness =
0.3mm.
Ordering information
Model
Tube type
Price
SMP1/4
Open both ends
$19.56 pk 100
SMP2/1
Sealed both ends
$19.56 pk 100
SMP10/1
Sealed at one end
$19.56 pk 100
10

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