PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Naphthol-8-sulfonic acid, sodium salt, 2- 832-85-9
4.00
3.00
Formula Synonyms
C10H8NaO4S
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
247.22
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.54 6.0 36
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.053 0.59 3.6
Technical Basis
A review of available sources did not identify exposure or toxicity data for 2-naphthol-8-sulfonic acid, sodium salt. Instead, a similar chemical 6-naphthol-6-sulfonic acid (Schaeffer's acid, CASRN: 93-01-6) was evaluated (Section 3.4.6). Data sources were selected according to the hierarchy listed in Table 3.1.Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2. A mouse oral LDLo for 6-naphthol-6-sulfonic acid was selected and evaluated using factors in Tables 3.2, 3.3, and 3.4. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Mouse oral LDLo (6-naphthol-6-sulfonic acid, CASRN: 93-01-6, 250 mg/kg)
This review generated TEEL values that are consistent with Rev. 29A.
References
https://pubchem.ncbi.nlm.nih.gov/compound/23674497
Zeitschrift fuer Hygiene und Infektionskrankheiten., 64(113), 1909. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/2-Naphthol-6-sulfonic-acid
Search Again
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.