Basic information on the toxicity of many of the most commonly encountered and toxicologically significant industrial chemicals is provided in Table IV–4. The table is intended to expedite the recognition of potentially hazardous exposure situations and therefore provides information such as vapor pressures, warning properties, physical appearance, occupational exposure standards and guidelines, and hazard classification codes, which may also be useful in the assessment of an exposure situation. Table IV–4 is divided into three sections: health hazards, exposure guidelines, and comments. To use the table correctly, it is important to understand the scope and limitations of the information it provides.
Table IV-4 Health Hazard Summaries for Industrial and Occupational Chemicals |Favorite Table|Download (.pdf)
Table IV-4 Health Hazard Summaries for Industrial and Occupational Chemicals
Abbreviations and designations used in this table are defined as follows:
International Agency for Research on Cancer overall classification (See Health hazard information): 1 = known human carcinogen; 2A = probable human carcinogen; 2B = possible human carcinogen; 3 = inadequate data available.
American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit value 8-hour time- weighted average (TLV-TWA) air concentration (See threshold limit value time-weighted average (TLV-TWA)): A1 = ACGIH-confirmed human carcinogen; A2 = ACGIH-suspected human carcinogen; A3 = ACGIH animal carcinogen.
parts of chemical per million parts of air.
milligrams of chemical per cubic meter of air.
million particles of dust per cubic foot of air.
ceiling air concentration (TLV-C) that should not be exceeded at any time.
Short-term (15-minute) exposure limit.
skin absorption can be significant route of exposure.
potential for worker sensitization as a result of dermal contact or inhalation exposure.
Judged by the National Institute for Occupational Safety and Health to be a known or suspected human carcinogen (See Occupational Safety & Health Administration (OSHA) regulations).
Regulated by the Occupational Safety & Health Administration as an occupational carcinogen (See Occupational Safety & Health Administration (OSHA) regulations).
Immediately Dangerous to Life or Health air concentration (See Immediately dangerous to life or health).
For this substance, the IDLH value is set at 10% of the Lower Explosive Limit.
Emergency Response Planning Guidelines air concentration values for a 1-hour period of exposure (See Emergency Response Planning Guidelines).
National Fire Protection Association hazard classification codes (See National Fire Protection Association (NFPA)):
0 (no hazard) <—> 4 (severe hazard).
H = health hazard
F = fire hazard
R = reactivity hazard
Ox = oxidizing agent
W = water-reactive substance
Health Hazard Summaries
NFPA Codes H F R
Acetaldehyde (CAS: 75-07-0): Corrosive; severe burns to eyes and skin may occur. Vapors strongly irritating to eyes and respiratory tract; evidence for adverse effects on fetal development in animals. A carcinogen in ...