CALCIUM SILICATE†
| CAS # | 1344-95-2 |
|---|---|
| Formula |
CaSiO₃ |
| Synonyms |
calcium hydrosilicate; calcium metasilicate; calcium monosilicate; calcium salt of silicic acid; calsium silicate (synthetic); See also, Wollastonite (mineral form) [CAS no. 13983-17-0]. |
| Physical description | White or cream colored, free flowing powder. (Note: The commercial product is prepared from diatomaceous earth and lime.) | ||
|---|---|---|---|
| Boiling point | Molecular weight | 116.2 | |
| Freezing point/melting point | 2804°F | Vapor pressure | 0 mmHg (approx) |
| Flash point | Vapor density | ||
| Specific gravity | 2.9 | Ionization potential | |
| Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
| NFPA health rating | NFPA fire rating | ||
| NFPA reactivity rating | NFPA special instruction | ||
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | C112 (total); request using analyte code 9135 | C122 (resp); request using analyte code 9130 | |
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | Tared low-ash 37 mm PVC filter, 5 microns [SLTC108] | Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108] | |
| Sampling time* | 240-480 min |
240-480 min |
|
| Sampling volume (TWA)* | 960 L |
816 L |
|
| Sampling flow rate (TWA)* | 2 L/min |
1.7 L/min ±5% |
|
| Sampling volume (STEL/Peak/C)* | |||
| Sampling flow rate (STEL/Peak/C)* | |||
| Analytical method instruments | Gravimetric | Gravimetric | |
| Method reference | OSHA PV2121 (partially validated) | OSHA PV2121 (partially validated) | |
| Notes | Samples collected for this compound are analyzed gravimetrically. Results reported for the requested compound will be qualified based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes; no further work on the sample will be performed due to method limitations. |
Samples collected for this compound are analyzed gravimetrically. Results reported for the requested compound will be qualified based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes; no further work on the sample will be performed due to method limitations. The standard applies to the Respirable Fraction. |
|
| Special requirements | FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!! |
Samples must be collected with a Dorr-Oliver cyclone. |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
| Wipe Sampler/Sampling media | |
|---|---|
| Bulk Method |
| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
|
Sampling information (see manufacturer instructions) |
|
OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
|||||
|---|---|---|---|---|---|---|---|
| PEL-TWA |
15 mg/m³ (total dust), 5 mg/m³ (respirable fraction) |
REL-TWA |
15 mg/m³ (total dust), 5 mg/m³ (respirable fraction) |
TLV-TWA | PEL-TWA |
10 mg/m³ (total dust), 5 mg/m³ (respirable dust) |
|
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C | TLV-C | PEL-C | ||||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
NA |
Skin notation |
N |
| Notes: | Notes: |
Notes:
Visit the ACGIH TLV site for specific data |
Notes:
See footnote [n]. |
||||
| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Wollastonite NIOSH: Pocket Guide to Chemical Hazards - Calcium silicate Literature References
|
Last Updated Date : 04/09/2024