ETHYL SILICATE†
| CAS # | 78-10-4 |
|---|---|
| Formula |
C₈H₂₀O₄Si |
| Synonyms |
ethyl orthosilicate; ethyl silicate (condensed); tetraethoxysilane; tetraethyl orthosilicate; tetraethyl silicate |
| Physical description | Colorless liquid with a sharp, alcohol-like odor. | ||
|---|---|---|---|
| Boiling point | 336°F | Molecular weight | 208.3 |
| Freezing point/melting point | -117°F | Vapor pressure | 1 mmHg |
| Flash point | 99°F | Vapor density | |
| Specific gravity | 0.93 | Ionization potential | 9.77 eV |
| Lower explosive limit (LEL) | 1.3% | Upper explosive limit (UEL) | 23% |
| NFPA health rating | 2 | NFPA fire rating | 3 |
| NFPA reactivity rating | 1 | NFPA special instruction | |
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 1230 | ||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | |||
| Sampling time* | |||
| Sampling volume (TWA)* |
9 L |
||
| Sampling flow rate (TWA)* |
0.05 L/min |
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| Sampling volume (STEL/Peak/C)* |
|
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| Sampling flow rate (STEL/Peak/C)* |
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| Analytical method instruments | |||
| Method reference | |||
| Notes |
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| Special requirements |
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* 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 |
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| Device | Infrared spectrophotometer | ||||
|---|---|---|---|---|---|
| Model/Type | Miran 1A & 1B | ||||
|
Sampling information (see manufacturer instructions) |
0.04 ppm at 9.1 µm |
|
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 |
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|---|---|---|---|---|---|---|---|
| PEL-TWA |
100 ppm (850 mg/m³) |
REL-TWA |
10 ppm (85 mg/m³) |
TLV-TWA |
10 ppm (85 mg/m³) |
PEL-TWA |
|
| PEL-STEL |
|
REL-STEL |
|
TLV-STEL |
|
PEL-STEL |
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| PEL-C |
|
REL-C |
|
TLV-C |
|
PEL-C |
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| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
NA |
| Notes: |
Notes:
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Notes:
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Notes:
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| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: Not listed |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
25 ppm/100 ppm/300 ppm |
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Additional Resources and Literature References
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NOAA: CAMEO Chemicals - Ethyl silicate NIOSH: Pocket Guide to Chemical Hazards - Ethyl silicate Literature References
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Last Updated Date : 12/19/2018