SODIUM CARBONATE CAS N°: 497-19-8 - UNEP Chemicals

OECD SIDS SODIUM CARBONATE
1.GENERAL INFORMATION Id 497-19-8
Date 19.02.2003
1.7.1 DETAILED USE PATTERN
1.7.2 METHODS OF MANUFACTURE
Origin of substance : Synthesis
Type : Production
Remark : Sodium carbonate can be produced from minerals which contain sodium
carbonate. It is present in large deposits in Africa and the United States as
either carbonate or trona, a mixed ore of equal molar amounts of the
carbonate and bicarbonate. However, about 70 % of the world production
capacity of sodium carbonate is manufactured by the Solvay (ammonia
soda) process, whereby ammonia is added to a solution of sodium chloride.
Carbon dioxide is then bubbled through to precipitate the bicarbonate,
NaHCO3. The sodium bicarbonate is decomposed by heat producing
sodium carbonate. The traditional Solvay process is utilised in most parts of
the world, with the exception of the U.S., where all production is based on
the minerals which contain sodium carbonate. Different qualities of the
sodium carbonate are produced based on the final use of the substance.
08.05.2002 (6) (15)
1.8 REGULATORY MEASURES
1.8.1 OCCUPATIONAL EXPOSURE LIMIT VALUES
1.8.2 ACCEPTABLE RESIDUES LEVELS
1.8.3 WATER POLLUTION
1.8.4 MAJOR ACCIDENT HAZARDS
1.8.5 AIR POLLUTION
1.8.6 LISTINGS E.G. CHEMICAL INVENTORIES
1.9.1 DEGRADATION/TRANSFORMATION PRODUCTS
1.9.2 COMPONENTS
1.10 SOURCE OF EXPOSURE
1.11 ADDITIONAL REMARKS
1.12 LAST LITERATURE SEARCH
Type of search : Internal and External
Chapters covered : 3, 4, 5
Date of search : 05.09.2000
Remark : A literature search has been done in 1994 by the industry to prepare the
IUCLID in the context of ’Council Regulation (EEC) No. 793/93 on the
Evaluation and Control of the Risks of Existing Substances’. This IUCLID
has been published by the European Chemicals Bureau.
An additional literature search has been done in 2000 by Solvay. It covered
UNEP PUBLICATIONS 31