Interactive Learning Paradigms, Incorporated


The Home page of ILPI's Safety Data Sheet (SDS) Resource, the leader in SDS information since 1995!
The history and philosophy behind this resource.
A curated collection of books and reference materials concerning Safety Data Sheets and closely related topics.
Paste your plain text SDS into the SDS-Demystifier, and it will be converted into a hypertext-enriched document with links to detailed explanations of each key term.
An extensive list of frequently asked questions about Safety Data Sheets including regulations, content, compliance, and more.
A humorous take on Safety Data Sheet jargon. Fill in the blanks on our entry form to generate a personalized Unsafety Data Sheet to share with your coworkers.
Since 1995, we've maintained this massive curated list of the best places to find Safety Data Sheets on the Internet.
You are here! Way more than a glossary, this hypertext-enhanced resource covers hundreds of SDS-related terms and expert knowledge. Each entry includes both the SDS relevance and links to additional authoritative resources.
Archived results of Safety Data Sheet related polls taken by some of our millions of site visitors
The OSHA regulations behind SDS regulations, including the inspection guidelines and over 400 official interpretations letters under the Hazard Communication Standard
Commercial suppliers of SDS authoring and management software as well as cloud compliance services.
Commercial companies that will create SDS's for your specific needs as well as SDS translation companies.

Safety signs, banners, and scoreboards? Get yours at Safety Emporium!


Flammable Gas

DOT Flammable Gas Division 2 Placard

Be sure you're in compliance with DOT placards and labels from Safety Emporium.

Definition

Flammable gases are defined by the U.S. Department of Transportation under 49 CFR 173.115 (Subpart D) as:

"...any material which is a gas at 20 oC (68 oF) or less and 101.3 kPa (14.7 psi) of pressure (a material which has a boiling point of 20 oC (68 oF) or less at 101.3 kPa (14.7 psi)) which -

  1. Is ignitable at 101.3 kPa (14.7 psi) when in a mixture of 13 percent or less by volume with air; or
  2. Has a flammable range at 101.3 kPa (14.7 psi) with air of at least 12 percent regardless of the lower limit.

Except for aerosols, the limits specified in paragraphs (a)(1) and (a)(2) of this section shall be determined at 101.3 kPa (14.7 psi) of pressure and a temperature of 20 oC (68 oF) in accordance with ASTM E681-09, Standard Test Method for Concentration Limits of Flammability of Chemicals or other equivalent method approved by the Associate Administrator for Hazardous Materials Safety.

Note: 101.3 kPa (14.7 psi) = normal atmospheric pressure, also denoted 1 atm.

Additional Info

DOT classifies flammable gases as Division 2.1 and requires warning labels and placards for shipments of such materials. See DOT Chart 15: Hazardous Materials Markings, Labeling and Placarding Guide for more information on placarding and shipping label requirements.

SDS Relevance

If applicable and known, flammable and explosive limits will appear in Section 9 (physical and chemical properties) of the Safety Data Sheet.

Always know the explosive/flammable limits for any flammable gas. For those who routinely work around flammable materials, special detectors are available that can indicate when conditions are within the flammable limits.

You must be properly trained in working with any kind of gas as these can present not only fire, poison, or explosion hazards, but the risk of asphyxiation. OSHA has special standards that apply to propane-powered lifts and forklifts as well.

gas cylinder storage locker

Safety Emporium has gas cylinder signs, racks, carts, clamps, lockouts and more to ensure your workers' safety.

Further Reading

See also: combustible, flammable aerosol, flammable, flash point.

Additional definitions from Google and OneLook.