ICSC 0333 - TETRAETHYL SILICATE

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TETRAETHYL SILICATE

ICSC: 0333
_{March 1998}

Tetraethoxysilane
Ethyl silicate
Tetraethyl orthosilicate

CAS No: 78-10-4
RTECS No: VV9450000
UN No: 1292
EC No: 014-005-00-0

(C₂H₅O)₄Si
Molecular mass: 208.3

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	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.	EU classification Xn Symbol R: 10-20-36/37 S: 2 UN classification UN Hazard Class: 3 UN Pack Group: III

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-30GF1-III NFPA Code: H2; F2; R2	Fireproof. Separated from acids, oxidants. Cool. Dry. Keep in a well-ventilated room.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

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).

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	ENVIRONMENTAL DATA
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

NOTES

Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Card has been partially updated in July 2007: see Occupational Exposure Limits.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006

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Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.

Updated by AS. Approved by GS. Last update: 29.01.2008