ICSC 0333 - TETRAETHYL SILICATE

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TETRAETHYL SILICATE	ICSC: 0333 (March 1998)
Tetraethoxysilane Ethyl silicate Tetraethyl orthosilicate

CAS #: 78-10-4

UN #: 1292

EC Number: 201-083-8

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


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Dizziness. Headache. Sore throat.	Use 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.	Wear 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 refer for medical attention.
Ingestion	Confusion. Vomiting. Further see Inhalation.		Rinse mouth.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Remove all ignition sources. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Note: Reacts with water to form an adhesive mass.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 3; UN Pack Group: III
STORAGE
Fireproof. Separated from acids and oxidants. Cool. Dry. Keep in a well-ventilated room.
PACKAGING

TETRAETHYL SILICATE

ICSC: 0333

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. Physical dangers Chemical dangers Reacts with acids, water and oxidants.	Formula: (C₂H₅O)₄Si Molecular mass: 208.3 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

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.

Physical dangers

Chemical dangers
Reacts with acids, water and oxidants.

Formula: (C₂H₅O)₄Si
Molecular mass: 208.3
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

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its vapour and by ingestion. Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. Exposure could cause lowering of consciousness.	Inhalation risk A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure The substance defats the skin, which may cause dryness or cracking. The substance may have effects on the kidneys.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. Exposure could cause lowering of consciousness.

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

Effects of long-term or repeated exposure
The substance defats the skin, which may cause dryness or cracking. The substance may have effects on the kidneys.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 1 ppm as TWA. MAK: 86 mg/m³, 10 ppm; peak limitation category: I(1); pregnancy risk group: D. EU-OEL: 44 mg/m³, 5 ppm as TWA

ENVIRONMENT

NOTES

ADDITIONAL INFORMATION

EC Classification
Symbol: Xn; R: 10-20-36/37; S: (2)

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