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Chemical Sampling Information (CSI)
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General Description

Synonyms: TMA

OSHA IMIS Code Number: 2502

Chemical Abstracts Service (CAS) Registry Number: 552-30-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DC2050000; 14493

Chemical Description and Physical Properties:
    White solid.

    molecular weight: 192.12
    melting point: 165C

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.04 mg/m3 Ceiling

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.005 ppm TWA; handle in the workplace as an extremely toxic substance

Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:

  • sampling media: Two Coated Glass Fiber Filters (37 mm) Coating is 10 mg Veratryamine and 10 mg di-n-octylphthalate.
    analytical solvent: 0.02 N Ammonium Hydroxide
    maximum volume: 480 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UV
    method reference: OSHA Analytical Method (OSHA 98)
    method classification: Fully Validated
    note: Store filters under refrigeration and use within 1 month. Small interfering peaks start appearing after that time.

Conditions:

  • column: Asahipak C4P-50 (C4)
    mobile phase: 25/75/0.1 Acetonitrile/Water/H3PO4
    detector: UV @ 205 or 232 nm
    alternate column: C18
    alternate mobile phase: 22.5/77.5/0.1 Acetonitrile/Water/H3PO4
    detector: UV @ 205 or 232 nm

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