This website is currently not being updated due to the suspension of federal government services.
The last update to the site was January 22, 2018.
Updates to the site will start again when the federal government resumes operations.
If you need to report a workplace fatality or emergency, call OSHA at 1-800-321-OSHA (6742), TTY 1-877-889-5627.

<< Back to Chemical Sampling Information

Chemical Sampling Information (CSI)
Search (use word(s)/phrase)
Table of Contents
By Name
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

By CAS Number
Quick Links

General Description

Synonyms: Hydrous magnesium silicate; Non-fibrous talc; Non-asbestiform talc; Steatite talc; Fibrous Non-Tremolite Talc; Talc (Total) prior to + 9/1/89

OSHA IMIS Code Number: 9030

Chemical Abstracts Service (CAS) Registry Number: 14807-96-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: WW2710000

NIOSH Pocket Guide to Chemical Hazards, Talc (Containing no asbestos): chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:
odorless solid
molecular weight: 295
vapor pressure: approx. 0 mm
melting point: 1652 to 1832 F
Incompatibilities None hazardous

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: See 29 CFR 1910.1000 Table Z-3

Construction Industry: 20 mppcf (Mineral Dusts Table)
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 2 mg/m3 TWA; The value is for particulate matter containing no asbestos and <1% crystalline silica. (Respirable fraction) Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 2 mg/m3 TWA


Health Factors

Carcinogenic Classification:
International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans [1 MB PDF, 137 pages]
Potential Symptoms: Fibrotic pneumoconiosis

Health Effects: Pneumoconiosis (Talcosis) (HE10)

Affected Organs: Lungs, CVS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns with 10 mm Nylon Cyclone
    maximum volume: 816 Liters
    maximum flow rate: 1.7 L/min
    current analytical method: Gravimetric Analysis
    method reference: 11, 12
    sampling and analytical error: 0.10
    method classification: Fully Validated
    note: Gravimetric analysis is a field method, do not submitted sample to SLTC. Standard is for inert dust; noncompliance can be based on gross weight without laboratory analysis. If the filter is not overloaded, samples may be collected up to an 8-hour period. Sample may be submitted to SLTC for Quartz analysis.
** All Trademarks are the property of their respective owners.
Page last updated: 01/15/1999

Accessibility Assistance: Contact the OSHA Directorate of Technical Support and Emergency Management at (202) 693-2300 for assistance accessing PDF materials.