Synonyms: Anhydrous boric acid; Boric anhydride; Boric oxide

OSHA IMIS Code Number: 0380

Chemical Abstracts Service (CAS) Registry Number: 1303-86-2

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: ED7900000

Chemical Description and Physical Properties:

colorless, glassy granules or flakes with no odor
molecular weight: 70
vapor pressure: approx. 0 mm
boiling point: 4622°F
melting point: 842°F

Incompatibilities: None hazardous

OSHA Permissible Exposure Limit (PEL):

General Industry: 15 mg/m³

Construction Industry: 15 mg/m³ TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m³ TWA)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m³ TWA

Potential Symptoms: Nasal irritation; conjunctivitis; erythema

Health Effects: Irritation-Eye, Nose, Throat, Skin---Mild (HE16)

Affected Organs: Skin, eyes

Primary Laboratory Sampling/Analytical Method (SLC1):

• sampling media: Tared Low Ash Polyvinyl Chloride (PVC) filter 5 microns
  maximum volume: 960 Liters
  minimum volume: 480 Liters
  maximum flow rate: 2.0 L/min
  current analytical method: Gravimetric
  method reference: 11, 12
  sampling analytical error: 0.10
  method classification: Fully Validated
  

Secondary Laboratory Sampling/Analytical Method (SAM2):

• alternate analytical method: Inductively Coupled Argon Plasma; ICP/DCP-AES
• method reference: 2 (OSHA ID-125G)
• method classification: Not Validated
• note: Submit as a separate sample only if the gross weight of the sample yields an air concentration greater than PEL. When the analysis of this compound is requested an analysis is performed for total Boron and reported as the compound.

Conditions: Soluble in boiling water and mineral acids

Wipe Sampling Method:

• sampling media: Whatman smear tab;
  analytical solvent: Deionized water
  

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