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Chemical Sampling Information (CSI)
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General Description

Synonyms: Stable pentaborane; Pentaboron nonahydride

OSHA IMIS Code Number: 1986

Chemical Abstracts Service (CAS) Registry Number: 19624-22-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: RY8925000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1380 75

Chemical Description and Physical Properties:

colorless liquid with a strong pungent odor; may ignite spontaneously in air
molecular weight: 63
vapor pressure: 171 mm
boiling point: 137°F
melting point: -52° + F

Incompatibilities: Oxidizers, halogens, halogenated compounds; impure material ignites spontaneously

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.005 ppm, 0.01 mg/m3

Construction Industry: 0.005 ppm, 0.01 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.005 ppm, 0.013 mg/m3 TWA; 0.015 ppm, 0.039 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.005 ppm TWA; 0.015 ppm STEL

Health Factors

Potential Symptoms: Dizziness; headaches; drowsiness, lightheadedness; incoordination; tremors; tonic spasms in face, neck, abdomen, limbs; convulsions; eye, skin irritation

Health Effects: Acute and Cumulative CNS damage (HE4) and (HE7)

Affected Organs: CNS, eyes, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 15 mL Deionized Water
    maximum volume: 480 Liters
    maximum flow rate: 1.0 L/min (TWA)
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min (STEL)
    current analytical method: Inductively Coupled Argon Plasma; ICP/DCP-AES
    method reference: 2 (OSHA In-house file)
    method classification: Not Validated
    note: Submit as a separate sample. An analysis is performed for total Boron and reported as the compound.

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: MSA
    part #: Reagent# 82099, Filter# 82388
    range: 0.01-1.0
    class: Mfg

Wipe Sampling Method:

  • sampling media: Whatman smear tab; Solvent: Deionized water

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