ICSC 1188 - METHYL SILICATE

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METHYL SILICATE	ICSC: 1188 (October 1997)
Tetramethyl silicate Tetramethyl orthosilicate Tetramethoxy silane

CAS #: 681-84-5

UN #: 2606

EC Number: 211-656-4

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Flammable. Above 20°C explosive vapour/air mixtures may be formed.	NO open flames, NO sparks and NO smoking. Above 20°C use a closed system, ventilation and explosion-proof electrical equipment.	Use water spray, powder, foam, carbon dioxide.

PREVENT GENERATION OF MISTS! STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Burning sensation. Cough. Shortness of breath. Sore throat. Symptoms may be delayed. See Notes.	Use local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Refer for medical attention.
Skin	Redness. Pain.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain. Loss of vision.	Wear safety goggles 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	Abdominal pain.	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Rest. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Carefully collect remainder. Then store and dispose of according to local regulations. Personal protection: chemical protection suit including self-contained breathing apparatus.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 6.1; UN Subsidiary Risks: 3; UN Pack Group: I
STORAGE
Fireproof. Separated from food and feedstuffs.
PACKAGING
Do not transport with food and feedstuffs.

METHYL SILICATE

ICSC: 1188

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID. Physical dangers Chemical dangers	Formula: C₄H₁₂O₄Si / (CH₃O)₄Si Molecular mass: 152.3 Boiling point: 121°C Melting point: -2°C Relative density (water = 1): 1.02 Solubility in water: none Vapour pressure, kPa at 20°C: 2.2 Relative vapour density (air = 1): 5.3 Flash point: 20°C c.c.

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID.

Physical dangers

Chemical dangers

Formula: C₄H₁₂O₄Si / (CH₃O)₄Si
Molecular mass: 152.3
Boiling point: 121°C
Melting point: -2°C
Relative density (water = 1): 1.02
Solubility in water: none
Vapour pressure, kPa at 20°C: 2.2
Relative vapour density (air = 1): 5.3
Flash point: 20°C c.c.

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 severely irritating to the eyes, skin and respiratory tract. Inhalation of the vapour may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated.	Inhalation risk A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure The substance may have effects on the kidneys and liver.

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 severely irritating to the eyes, skin and respiratory tract. Inhalation of the vapour may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated.

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

Effects of long-term or repeated exposure
The substance may have effects on the kidneys and liver.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 1 ppm as TWA

ENVIRONMENT

NOTES
Other melting points: -8°C . The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.

ADDITIONAL INFORMATION

EC Classification

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