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Frequently Asked Questions

1. What are Ozone Depleting Substances (ODS) and Hazardous Air Pollutants (HAPs)?

Ozone is a poisonous gas made up of three oxygen molecules. A thin layer of ozone high up in the stratosphere absorbs all but a small fraction of the harmful ultraviolet rays (UV-B) coming from the Sun. Without this protection, life on earth as we know it would be impossible. Ozone Depleting Substances (ODS) are known as halocarbons compounds containing chlorine, fluorine, bromine carbon, hydrogen such as chlorofluorocarbons (CFCs) or Freon. When released into the atmosphere they eventually reach the stratosphere where they are broken apart by solar radiation to release chlorine atoms. The chlorine reacts strongly with the ozone molecules, forming chlorine oxide. The chlorine oxide is broken down again by solar radiation and the re-released chlorine atoms attack more ozone molecules. If we do not reduce the release of ODSs, eventually the protective ozone layer will no longer be able to absorb the harmful UV-B rays with disastrous consequences for mankind.

Hazardous Air Pollutants (HAPs) are those pollutants that are known or suspected to cause cancer or other serious health effects, such as reproductive effects or birth defects, or adverse environmental effects. Examples of toxic air pollutants include benzene, which is found in gasoline; perchlorethlyene, which is emitted from some dry cleaning facilities; methyl ethyl ketone, which is used a solvent: and methylene chloride, which is used as a solvent and paint stripper by a number of industries. There are 189 HAPs listed in the Clean Air Act of 1990. You can find the complete list of HAPs at

2. What are the Montreal Protocol, Clean Air Act and NESHAPs?

In 1987, under the auspices of the United Nations, 46 nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer. The Protocol required parties to either make sharply reduce or freeze production and consumption of various Ozone Depleting Substances. Additional ODSs were added in various amendments during sessions in London (1990), Copenhagen (1992) Montreal (1997) and Beijing (1999).

The Clean Air Act of 1990 was passed to address the various types and sources of air pollution in the United States including smog (ground level ozone) and Hazardous Air Pollutants (HAPs). It gave authority to the Environmental Protection Agency (EPA) to set limits on how much of a pollutant can be in the air anywhere in the United States . Each state has to develop plans to meet these limits or face sanctions and fines by the Federal Government.

One of the ways the EPA is working to reduce HAPs is through National Emission Standards for Hazardous Air Pollutants (NESHAPs). The EPA identifies major emitters of HAPs by industry and issues a comprehensive set of regulations to reduce emissions in that industry on a national basis. Examples would be the Aerospace NESHAP or the Printing/Publishing NESHAP.

3. What is the SNAP List?

SNAP stands for Significant New Alternatives Program. This is a program run by the EPA to identify substitutes for Ozone Depleting Substances (ODS). Substitutes are reviewed on the basis of ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential.

4. Why do the DS-Series Solvents comply with these environmental regulations?

The DS-Series Solvents contain no Ozone Depleting Substances (ODS) or Hazardous Air Pollutants (HAP). Additionally, with vapor pressures under 7 mm Hg, DS-104, DS-108, DS-144 and DS-800 comply with the most desirable classification under the Aerospace NESHAP. The remainder of the DS-Series Solvents fall in the <45 mm Hg composite vapor pressure category which also comply.

5. What packaging sizes are available?

DS-104, DS-108 and DS-144 are available in 55-gallon drums, 5-gallon jerricans, 4 x 1-gallon cases, 1-gallon and a 24 x 16 oz cases. DS-800, DS-801, H901A and 3101 are available in 55-gallon drums, 5-gallon and 1-gallon cans. All our solvents are also available in presaturated wipers packaged for us by Contec®, the industry leader in presaturated wiper technology.

6. Are the DS-Series Solvents classified as Hazardous Materials for transportation?

DS-144 is not regulated by any means of transport. DS-104, DS-108 and DS-800 are not regulated for ground transportation in North America but are classified as Flammable Liquids for transport by Air or Ocean. DS-801, H901A and 3101 are classified as Flammable Liquids for all means of transportation.