ICSC 0359 - SODIUM METASILICATE (ANHYDROUS)

« back to the search result list

SODIUM METASILICATE (ANHYDROUS)	ICSC: 0359 (April 2004)
Silicic acid, sodium salt Disodium metasilicate Disodium trioxosilicate

CAS #: 6834-92-0

UN #: 3253

EC Number: 229-912-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible.		In case of fire in the surroundings, use appropriate extinguishing media.

PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Sore throat. Burning sensation. Cough. Shortness of breath.	Use local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin	Redness. Pain. Skin burns.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .
Eyes	Redness. Pain. Severe burns.	Wear face shield or eye protection in combination with breathing protection if powder.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	Burning sensation. Abdominal pain. Shock or collapse.	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered plastic containers. If appropriate, moisten first to prevent dusting. Cautiously neutralize remainder with dilute acid (preferably acetic acid). Then wash away with plenty of water.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 8; UN Pack Group: III
STORAGE
Separated from strong acids, food and feedstuffs, metals and halogens. Store in an area having corrosion resistant concrete floor.
PACKAGING
Do not transport with food and feedstuffs.

SODIUM METASILICATE (ANHYDROUS)

ICSC: 0359

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS-TO-WHITE HYGROSCOPIC SOLID IN VARIOUS FORMS. Physical dangers Chemical dangers The solution in water is a strong base. It reacts violently with acid and is corrosive to aluminium and zinc. This produces flammable/explosive gas (hydrogen - see ICSC 0001). Reacts with halogens. This generates fire hazard.	Formula: Na₂SiO₃ Molecular mass: 122.1 Melting point: 1089°C Density: 2.6 g/cm³ Solubility in water: good

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-WHITE HYGROSCOPIC SOLID IN VARIOUS FORMS.

Physical dangers

Chemical dangers
The solution in water is a strong base. It reacts violently with acid and is corrosive to aluminium and zinc. This produces flammable/explosive gas (hydrogen - see ICSC 0001). Reacts with halogens. This generates fire hazard.

Formula: Na₂SiO₃
Molecular mass: 122.1
Melting point: 1089°C
Density: 2.6 g/cm³
Solubility in water: good

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. Effects of short-term exposure The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion.

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT

NOTES

ADDITIONAL INFORMATION

EC Classification
Symbol: C; R: 34-37; S: (1/2)-13-24/25-36/37/39-45

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.