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Permissible Exposure Limits – Annotated Tables. Table Z-1. Table Z-2. Table Z-3. Important Note on ACGIH TLV®. Note: This table only includes occupational exposure limits (OELs) for substances listed in the OSHA Z-1 Table. OELs for hundreds of additional substances have been adopted by Cal/OSHA, NIOSH, and ACGIH.
Jun 30, 2019 · The Standard includes three tables: Z-1 describes limits for air contaminants. Z-2 describes limits for substances that have ceiling levels. Z-3 describes limits to the exposure of mineral dust. The PELs listed in Table Z-1 are eight-hour Time Weighted Average (TWA) or Ceiling Limits (C).
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- Chemical Name
- Structure/Formula
- CAS Number
- RTECS Number
- Dot ID and Guide Numbers
- Synonyms and Trade Names
- Conversion Factors
- Exposure Limits
- Immediately Dangerous to Life and Health
- Physical Description
The chemical name found in the OSHA General Industry Air Contaminants Standard (29 CFR 1910.1000) is listed in the top left portion of each chemical table.
The chemical structure or formula is listed under the chemical name in each chemical table. Carbon-carbon double bonds (-C=C-) have been indicated where applicable.
This Chemical Abstracts Service (CAS) registry number is provided in the top right portion of the chemical tables. The CAS number, in the format xxx-xx-x, is unique for each chemical and allows efficient searching on computerized data bases. The CAS number indexcan be used to find a chemical based on the CAS number.
This section lists the Registry of Toxic Effects of Chemical Substances (RTECS®) number, in the format ABxxxxxxx. RTECS®may be useful for obtaining additional toxicologic information on a specific substance. The RTECS number indexcan be used to find a chemical based on the RTECS® number. RTECS® is a compendium of data extracted from the open scient...
This section lists the U.S. Department of Transportation (DOT) Identification numbers and the corresponding Guide numbers. Their format is xxxx yyy. The Identification (ID) number (xxxx) indicates that the chemical is regulated by DOT. The Guide number (yyy) refers to actions to be taken to stabilize an emergency situation; this information can be ...
This section of each chemical table contains an alphabetical list of common synonyms and trade names for each chemical. The Chemical Name, Synonym and Trade Name Index can be used to search for chemical pages. This index also includes the primary chemical names for all of the chemicals in the Pocket Guide.
This section lists factors for the conversion of ppm (parts of vapor or gas per million parts of contaminated air by volume) to mg/m3(milligrams of vapor or gas per cubic meter of contaminated air) at 25°C and 1 atmosphere for chemicals with exposure limits expressed in ppm.
The NIOSH recommended exposure limits (REL s) are listed first in this section. For NIOSH RELs, “TWA ” indicates a time-weighted average concentration for up to a 10-hour workday during a 40-hour workweek. A short-term exposure limit (STEL) is designated by “ST ” preceding the value; unless noted otherwise, the STEL is a 15-minute TWA exposure that...
This section lists the immediately dangerous to life or health concentrations (IDLHs). For the June 1994 Edition of the Pocket Guide , NIOSH reviewed and in many cases revised the IDLH values. The criteria utilized to determine the adequacy of the original IDLH values were a combination of those used during the Standards Completion Program and a ne...
This entry provides a brief description of the appearance and odor of each substance. Notations are made as to whether a substance can be shipped as a liquefied compressed gas or whether it has major use as a pesticide.
The permissible exposure limit (PEL or OSHA PEL) is a legal limit in the United States for exposure of an employee to a chemical substance or physical agent such as high level noise. Permissible exposure limits were established by the Occupational Safety and Health Administration (OSHA).
Oct 10, 2014 · Of these, OSHA has occupational exposure limits for only about 470 substances. Most of these are listed as simple limits and appear in tables (referred to as "Z-tables") in 29 CFR 1910.1000, Air Contaminants, Subpart Z, Toxic and Hazardous Substances; Ex. #4.
