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TETRAETHYL SILICATE

ICSC: 0333

Tetraethoxysilane
Ethyl silicate
Tetraethyl orthosilicate
(C2H5O)4Si
Molecular mass: 208.3
ICSC # 0333 		CAS # 78-10-4
RTECS # VV9450000
UN # 1292
EC # 014-005-00-0
March 25, 1998 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Water spray, foam, alcohol-resistant foam.
EXPLOSION Above 37°C explosive vapour/air mixtures may be formed.
Above 37°C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE


•INHALATION Cough. Dizziness. Headache. Sore throat.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest.
•SKIN Dry skin. Redness.
Protective gloves.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
•EYES Redness. Pain.
Safety spectacles or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Confusion. Vomiting. (Further see Inhalation).

Rinse mouth.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Remove all ignition sources. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Note: Reacts with water to form an adhesive mass.
Fireproof. Separated from acids, oxidants . Cool. Dry. Keep in a well-ventilated room.

Xn symbol
R: 10-20-36/37
S: 2
UN Hazard Class: 3
UN Packing Group: III
ICSC: 0333 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

TETRAETHYL SILICATE

ICSC: 0333

I

M

P

O

R

T

A

N

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D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
Reacts with acids , water and oxidants .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm as TWA; (ACGIH 2004).
MAK: 10 ppm, 86 mg/m3;
Peak limitation category: I(1); Pregnancy risk group: D;
(DFG 2006).
OSHA PEL†: TWA 100 ppm (850 mg/m3)
NIOSH REL: TWA 10 ppm (85 mg/m3)
NIOSH IDLH: 700 ppm See: 78104


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

INHALATION RISK:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. Exposure could cause lowering of consciousness.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The liquid defats the skin. The substance may have effects on the kidneys .

PHYSICAL
PROPERTIES

Boiling point: 168°C
Melting point: -77°C
Relative density (water = 1): 0.93
Solubility in water: slowly hydrolyzes
Vapour pressure, Pa at 20°C: 200
Relative vapour density (air = 1): 7.22
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 37°C c.c.
Explosive limits, vol% in air: 1.3-23

ENVIRONMENTAL
DATA


N O T E S

Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-30GF1-III

NFPA Code: H2; F2; R2;

ADDITIONAL INFORMATION



ICSC: 0333 TETRAETHYL SILICATE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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