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General Information on Chemical Resistance
Interpretation of Chemical Resistance
Additional Chemical Resistance Information
Effects of Chemicals on Plastics
Environmental Stress-Cracking
Interpretation of Chemical Resistance
The General Chemical Resistance Chart and Chemical Resistance Summary Chart that follow are general guides only. Because so many factors can affect the chemical resistance of a given product, you should test under your own conditions. If any doubt exists about specific applications of NALGENE products, please contact our Technical Service.

Additional Chemical Resistance Information
The General Chemical Resistance Chart may be used for all labware including containers up to 50L. For NALGENE Centrifuge Ware or UltraPlus Centrifuge Ware, refer to the Chemical Resistance of Centrifuge Ware.

For Tanks, refer to the Chemical Resistance of Tanks

Effects of Chemicals on Plastics
Chemicals can affect the strength, flexibility, surface appearance, color, dimensions or weight of plastics. The basic modes of interaction which cause these changes are: (1) chemical attack on the polymer chain, with resultant reduction in physical properties, including oxidation; reaction of functional groups in or on the chain; and depolymerization; (2) physical change, including absorption of solvents, resulting in softening and swelling of the plastic; permeation of solvent through the plastic; dissolution in a solvent; and (3) stress-cracking from the interaction of a "stress-cracking agent" with molded-in or external stresses. Also see Chemical Resistance Classification.

The reactive combination of compounds of two or more classes may cause a synergistic or undesirable chemical effect. Other factors affecting chemical resistance include temperature, pressure and internal or external stresses (e.g., centrifugation), length of exposure and concentration of the chemical. As temperature increases, resistance to attack decreases .

Caution: Mixing and/or dilution of certain chemicals in NALGENE Labware can be potentially dangerous. The reactive combination of different chemicals or compounds of two or more classes may cause an undesirable chemical effect or result in an increased temperature which can affect chemical resistance (as temperature increases, resistance to attack decreases). Other factors affecting chemical resistance include pressure and internal or external stresses (e.g., centrifugation), length of exposure and concentration of the chemical.

Environmental Stress-Cracking
Environmental stress-cracking is the failure of a plastic material in the presence of certain types of chemicals. This failure is not a result of chemical attack. Simultaneous presence of three factors causes stress-cracking: tensile stress, a stress-cracking agent and inherent susceptability of the plastic to stress-cracking.

Common stress-cracking agents are detergents, surface active chemicals, lubricants, oils, ultra-pure water and plating additives, such as brighteners and wetting agents. Relatively small concentrations of stress-cracking agent may be sufficient to cause cracking.

Mixing and/or dilution of certain chemicals may result in reactions which produce heat which can cause product failure. Pretest your specific usage and always follow correct lab safety procedures.

ATTENTION: Please be aware that, although several polymers may have excellent resistance to various flammable organic chemicals and solvents, OSHA H CFR 29 1910.106 for flammable and combustible materials, or other local regulations, may restrict the volumes of solvents which may legally be stored in an enclosed area.

Caution: Do not store strong oxidizing agents in plastic labware except those made of TEFLON FEP or PFA. Prolonged exposure causes embrittlement and failure. While prolonged storage may not be intended at time of filling, a forgotten container will fail in time and result in leakage of contents. Do not place any plastic labware in a flame. Type HP beakers are the only NALGENE products designed for hot plate use.

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