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NIOSH

SODIUM METASILICATE (ANHYDROUS)

ICSC: 0359

Silicic acid, sodium salt
Disodium metasilicate
Disodium trioxosilicate
Na2SiO3
Molecular mass: 122.1
ICSC # 0359 		CAS # 6834-92-0
RTECS # VV9275000
UN # 3253
EC # 014-010-00-8
April 21, 2004 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Not combustible.

In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Sore throat. Burning sensation. Cough. Shortness of breath.
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 deep burns.
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 take to a doctor.
•INGESTION Burning sensation. Abdominal pain. Shock or collapse.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Sweep spilled substance into 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. Personal protection: P2 filter respirator for harmful particles.
Separated from strong acids, food and feedstuffs , metals , halogens . Store in an area having corrosion resistant concrete floor.
Do not transport with food and feedstuffs.
C symbol
R: 34-37
S: 1/2-13-24/25-36/37/39-45
UN Hazard Class: 8
UN Packing Group: III
ICSC: 0359 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.

SODIUM METASILICATE (ANHYDROUS)

ICSC: 0359

I

M

P

O

R

T

A

N

T


D

A

T

A

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 corrosivetoaluminium,zincforming flammable/explosive gas (hydrogen - see ICSC0001). Reacts with halogens causing fire hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.


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

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Melting point: 1089°C
Density: 2.6
g/cm3
Solubility in water:
good

ENVIRONMENTAL
DATA


N O T E S

Transport Emergency Card: TEC (R)-80GC6-II+III

ADDITIONAL INFORMATION



ICSC: 0359 SODIUM METASILICATE (ANHYDROUS)
(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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