ETHYL SILICATE†

Chemical Identification
Chemical Identification
CAS # 78-10-4
Formula

C₈H₂₀O₄Si

Synonyms

ethyl orthosilicate; ethyl silicate (condensed); tetraethoxysilane; tetraethyl orthosilicate; tetraethyl silicate

Physical Properties
Physical Properties
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
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
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

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
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device Infrared spectrophotometer
Model/Type Miran 1A & 1B
Sampling information
(see manufacturer instructions)
0.04 ppm at 9.1 µm
Exposure Limits
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
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
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
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Skin notation
 

NA

Notes:
 

See 29 CFR 1910.1000 Table Z-1.

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:
 

25 ppm/100 ppm/300 ppm

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Ethyl silicate

NIOSH: Pocket Guide to Chemical Hazards - Ethyl silicate

Literature References

 

 

Last Updated Date : 12/19/2018