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Chemical Sampling Information (CSI)
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General Description

Synonyms: Crystalline quartz (total dust)

OSHA IMIS Code Number: S103

Chemical Abstracts Service (CAS) Registry Number: 14808-60-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VV7330000






Exposure Limits and Health Effects

Exposure Limit

Limit Values

HE Codes

Health Factors and Target Organs

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

30 mg/m3
%SiO2+2

HE10

Silicosis

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL)
(Listed under Crystalline Silica)
See Appendix A

0.05 mg/m3
TWA

Ca

HE10

Silicosis

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV)

Not established

 

 

CAL/OSHA PEL

0.3 mg/m3
TWA

 

 

National Toxicology Program (NTP) carcinogenic classification: Not listed

International Agency for Research on Cancer (IARC) carcinogenic classification: Group 1 [72 KB PDF, 24 pages] (carcinogenic to humans); see also IARC Monograph 100C [979 KB PDF, 52 pages]

U.S. Environmental Protection Agency (EPA) carcinogenic classification: Not listed

EPA Inhalation Reference Concentration (RfC): Not established

Agency for Toxic Substances and Disease Registry (ATSDR) Inhalation Minimal Risk Level (MRL): Not established

NIOSH Immediately Dangerous to Life or Health (IDLH) concentration: Not listed

Notes on Other Potential Health Effects and Hazards

  1. Silicosis increases risk of tuberculosis and other respiratory diseases (American Thoracic Society 1997).
  2. Extrapulmonary silicosis has also been found, where lesions spread to the liver, spleen, kidneys, bone marrow, and extrathoracic lymph nodes (IARC 1997).

Literature Basis

Date Last Revised: 9/6/2012

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

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