PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calcium metasilicate | 10101-39-0 |
15.01
|
||||||||||
| Formula | Synonyms | |||||||||||
| Ca.Si.O3 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 116.17 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 30 | 330 | 2000 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 6.3 | 69 | 420 |
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for calcium metasilicate. Reported GHS health hazard ratings (H319, Category 2; H335, Category 3) indicate a mid-level health hazard, approximately equivalent to an HHR=2. However, this chemical does not meet GHS hazard criteria in 86% of surveyed reports. Considering this, analysts instead selected the PNOS TLV-TWA as the TEEL-1 basis (PNOS, Section 3.5.2). TEEL-3 and TEEL-2 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TLV-TWA (PNOS, 10 mg/m3) x 3
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A*.
• PAC-1 = TEEL-1 = TLV-TWA (PNOS, 10 mg/m3) x 3
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Calcium-metasilicate
PNOR/PNOS TLV-TWA: https://www.osha.gov/chemicaldata/801