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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2-Naphthylamine

OSHA IMIS Code Number: 1820

Chemical Abstracts Service (CAS) Registry Number: 91-59-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: QM2100000; 51352

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1650 Poison

NIOSH Pocket Guide to Chemical Hazards, beta-Naphthylamine: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

odorless, white to reddish, leaflet-shaped crystals which darken in air to reddish-purple color
molecular weight: 143
vapor pressure: 1 mm at 108°C
boiling point: 583°F
melting point: 230°F

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: Cancer-Suspect Agent 29 CFR 1910.1009

Construction Industry: Carcinogen - See Threshold Limit Value pamphlet, Appendix A

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): Appendix A1 (Confirmed Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Potential Carcinogen, Use 29 CFR 1910.1009

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 1, carcinogenic to humans [424 KB PDF, 10 pages] (2-Naphthylamine)

National Toxicology Program (NTP): Human Carcinogen

Potential Symptoms: Dermatitis; hemorrhagic cystitis; dyspnea; ataxia; methemoglobinemia, hematuria, dysuria; (carcinogenic)

Health Effects: Cancer-Bladder (HE1);

Affected Organs: Bladder, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Coated Glass Fiber Filters (37 mm) in 3 piece cassette. Coating is Sulfuric Acid.
    maximum volume: 100 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/ECD
    method reference: 2 (OSHA 93)
    method classification: Fully Validated
    note: Within ten hours after sampling, transfer filter to glass vial containing 2 mL deionized water. Filters may be obtained by OSHA personnel from the Salt Lake Technical Center.

Conditions: NH2 column; 85% Isooctane 15% Isopropanol; 1 mL/min; Fluorescence ex 237, em 370; Retention time, 10 min; DL 20 pg/inj; C/P WH 11/78

Wipe Sampling Method:

  • Sulfuric acid coated glass fiber filters, within 10 hours place filter in glass vial containing 2 mL deionized water.

Bulk Method:

  • Limit the amount of bulk submitted to one gram or one mL.

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