METHYL SILICATE†
Chemical Identification | |
---|---|
CAS # | 681-84-5 |
Formula |
C₄H₁₂O₄Si |
Synonyms |
methyl orthosilicate; tetramethoxysilane; tetramethyl ester of silicic acid; tetramethyl silicate |
Physical Properties | |||
---|---|---|---|
Physical description | Clear, colorless liquid. | ||
Boiling point | 250°F | Molecular weight | 152.3 |
Freezing point/melting point | 28°F | Vapor pressure | 12 mmHg at 77°F |
Flash point | 205°F | Vapor density | |
Specific gravity | 1.02 | Ionization potential | |
Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
NFPA health rating | 3 | NFPA fire rating | 3 |
NFPA reactivity rating | 1 | NFPA special instruction | |
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
---|---|---|---|---|---|---|
Analyte code (IMIS no.) | ||||||
Sampling group | ||||||
Sampler/Sampling media | ||||||
Sampling time* | ||||||
Sampling volume (TWA)* | ||||||
Sampling flow rate (TWA)* | ||||||
Sampling volume (STEL/Peak/C)* | ||||||
Sampling flow rate (STEL/Peak/C)* | ||||||
Analytical method instruments | ||||||
Method reference | ||||||
Notes | ||||||
Special requirements |
* 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 Method | |
---|---|
Sampler/Sampling media |
|
Bulk Method |
---|
|
On-Site Screening Techniques | ||||||
---|---|---|---|---|---|---|
Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
Exposure Limits | |||||||
---|---|---|---|---|---|---|---|
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 |
|
REL-TWA |
1 ppm (6 mg/m³) |
TLV-TWA |
1 ppm [1978] |
PEL-TWA |
1 ppm (6 mg/m³) |
PEL-STEL |
|
REL-STEL |
|
TLV-STEL |
|
PEL-STEL |
|
PEL-C |
5 ppm (30 mg/m³) |
REL-C |
|
TLV-C |
|
PEL-C |
|
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes:
OSHA PEL applies to Contruction and Maritime Industries only. See 29 CFR 1926.55 Appendix A and 29 CFR 1915.1000 Table Z-Shipyards. |
Notes:
|
Notes:
|
Notes:
|
||||
Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: Not listed |
Notes:
|
||||||
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
--/10 ppm/20 ppm |
Additional Resources and Literature References |
---|
NOAA: CAMEO Chemicals - Methyl orthosilicate NIOSH: Pocket Guide to Chemical Hazards - Methyl silicate Literature References
|
Last Updated Date : 01/05/2021