PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Sodium bisulfite 7631-90-5 2693
15.01
4.01
11.01
15.02
4.05
11.00
4.07
3.08
9.00
3.02
Formula Synonyms
HNaO3S SODIUM BISULFITE, [LIQUID], SODIUM HYDROGEN SULFITE, [SOLID], SODIUM HYDROGEN SULFITE, [SOLUTION], FR-62, HYDROGEN SODIUM SULFATE, HYDROGEN SULFITE SODIUM, MONOSODIUM SALT OF SULFUROUS ACID, MONOSODIUM SULFITE, SODIUM ACID BISULFITE, SODIUM ACID SULFITE, SODIUM BISULFITE, SODIUM BISULFITE (NAHSO3), SODIUM BISULFITE SOLUTION, SODIUM BISULPHITE, SODIUM HYDROGEN SULFITE, SODIUM HYDROGEN SULFITE SOLUTION (35% OR LESS), SODIUM SULFITE (NAHSO3)
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
104.06 S 1.48
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
3.5 16 93
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
15 68 400
Technical Basis
A review of available data sources identified the following: TLV-TWA1 and LD50 (dog2, rat3) for oral, and intraperitoneal routes. Toxicity data were evaluated for their relative preference ranking (Section 3.3.32, Table 3.1). The rat, oral LD50 data was selected to estimate a TEEL-3 value. A TEEL-2 was calculated from the TEEL-3 value, according to Table 3.5. The TLV-TWA was used to estimated TEEL-1 value.
• TEEL-1 = TLV-TWA x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Estimated from rat, oral LD50 (2000 mg/kg)
This review generated TEEL values consistent with those published in Rev. 29A.
References
TLV-TWA, 1992: https://www.osha.gov/chemicaldata/614
Dog, intraperitoneal LD50: CLPTAT 9,328,1968; RTECS: VZ2000000 via NIOSH pocketbook: https://www.cdc.gov/niosh-rtecs/VZ1E8480.html
Rat, oral LD50: 85INA8 6,1408,1991; RTECS: VZ2000000 via NIOSH pocketbook: https://www.cdc.gov/niosh-rtecs/VZ1E8480.html
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.