Basic information
- CAS
10124-41-1- Standard SMILES
O=S([O-])([O-])=S.[Ca+2]- InChIKey
FAYYUXPSKDFLEC-UHFFFAOYSA-L- Molecular formula
- CaO3S2
- Average molar mass
- 152.2 g/mol
- Monoisotopic mass
- 151.8914771
Overview
See also: Calcium Cation (has active moiety).
Names & identifiers
- Preferred name
- Calcium Thiosulfate
- IUPAC
- calcium dioxido-oxo-sulfanylidene-λ6-sulfane
- English name
- calcium thiosulphate
- Molecular formula
- Ca.H2O3S2
- Molecular weight
- 154.22
Names & synonyms
CALCIUM THIOSULFATECalcium thiosulphate10124-41-1Calcium hyposulfiteThiosulfuric acid (H2S2O3), calcium salt (1:1)Thiosulfuric acid, calcium salt (1:1)Calcium thiosulfate (Ca(S2O3))2IO10O728EDTXSID2034415RefChem:122919DTXCID0014415233-333-7
Show more names
calcium thiosulfate [ca(s2o3)]thiosulfuric acid, calcium saltCalcium thiosulfate hexahydrate.Calcium thiosulfate, 50% solutioncalcium,dioxido-oxo-sulfanylidene-λ6-sulfaneCalciuM thiosulfate, pure, 30-50% solution in water
Tecesalcalcium;dioxido-oxo-sulfanylidene-lambda6-sulfaneCaswell No. 153HSDB 2507EINECS 233-333-7EPA Pesticide Chemical Code 080101UNII-2IO10O728ECalciumthiosulfat
Database identifiers
- CAS
10124-41-1- PubChem CID
- 24964
- DTXSID
DTXSID2034415
Properties
Computed structural properties
- Topological polar surface area
- 104 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 6
- Formal charge
- 0
- Complexity
- 82.6
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
Physical Description
Liquid
(50% solution): Liquid; Soluble in water; [MSDSonline]
Stability/Shelf Life
WHEN DRY, DECOMP ON STANDING FORMING YELLOW CRUST ON SURFACE; MORE STABLE IF KEPT DAMP & STORED BELOW 0 °C /HEXAHYDRATE/
SPONTANEOUSLY DECOMPOSES @ 43-49 °C /HEXAHYDRATE/
Other Experimental Properties
TRICLINIC CRYSTALS; FREELY SOL IN WATER; PRACTICALLY INSOL IN ALCOHOL; SPONTANEOUSLY DECOMPOSES @ 43-49 °C; DENSITY: 1.87 /HEXAHYDRATE/
100 G SOL IN 100 CC WATER @ 3 °C; DECOMPOSES @ MELTING POINT & IN HOT WATER /HEXAHYDRATE/
WHITE CRYSTALS; EFFLORESCES @ 40 °C /SRP: BECOMES POWDERY IN CONSEQUENCE OF LOSING THE WATER OF CRYSTALLIZATION/ /HEXAHYDRATE/
When dry, decomposes on standing forming a yellow crust on surface /hexahydrate/
Physicochemical properties
- Melting point
- 10 · decomposes [CRC10]
- Density
- 1.87 · 1.870
- solubility
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 100% (3 of 3) of all reports.
Not Classified
Aggregated GHS information provided per 3 reports by companies from 1 notifications to the ECHA C&L Inventory.
Hazard information
Regulatory Information
Chemical: Thiosulfuric acid (H2S2O3), calcium salt (1:1)
Thiosulfuric acid (H2S2O3), calcium salt (1:1) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Thiosulfuric acid (H2S2O3), calcium salt (1:1) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
PMN - indicates a commenced PMN (Pre-Manufacture Notices) substance.
REACH registered substance: Calcium thiosulphate (EC: 233-333-7)
Calcium thiosulfate: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Hazards Summary
The oral lethal dose for humans of thiosulfate salts is probably 0.5-5 g/kg; Sodium thiosulfate is toxic by ingestion causing gastrointestinal disturbance; [HSDB] May cause irritation; Intraperitoneal LD50 (mouse) = 115 mg/kg; [MSDSonline] See Ammonium thiosulfate. See Calcium.
FDA Requirements
Manufacturers, packers, and distributors of drug and drug products for human use are responsible for complying with the labeling, certification, and usage requirements as prescribed by the Federal Food, Drug, and Cosmetic Act, as amended (secs 201-902, 52 Stat. 1040 et seq., as amended; 21 U.S.C. 321-392).
FIFRA Requirements
Chemistry & industry
Pharmacology
Absorption, Distribution and ExcretionREMARKABLY INERT IN VIVO, EXCEPT FOR OSMOTIC DISTURBANCES. POORLY ABSORBED FROM THE ALIMENTARY TRACT AND SO ACTS AS AN OSMOTIC CATHARTIC. /THIOSULFATE SALTS/
Uses & manufacturing
Uses
Used as a fungicide, noncorrosive concrete-set accelerator, and polymerization catalyst; Was used in the treatment of arsphenamine side effects; [HSDB]
Farming (Pesticides) [Category: Industry]
MEDICATION: IN DERMATITIS & JAUNDICE DUE TO ARSPHENAMINE
IN SULFUR FUNGICIDES
As a component of the fungicide and insecticide lime sulfur (ca 5% calcium thiosulfate) used as standard dormant spray for control of the San Jose scale (Aspidiotus perniciosus) and for other scales and various plant diseases
Fungicide formualtions, a noncorrosive concrete-set accelerator, and a catalyst for polyolefin mfg
U.S. Production2023: 10,000,000 - <25,000,000 lb
Consumer UsesSoil amendments (fertilizers)
Industry UsesSoil amendments (fertilizers)
Methods of Manufacturing
BALLEZO, KAUFMANN, MONATSH 80, 220 (1949); LEVENSON, US PATENT 2,763,531 (1956 TO KODAK).
Has been prepared from calcium sulfite and sulfur at 30-40 °C, or from boiling lime and sulfur in the presence of sulfur dioxide...alternatively, a concn solution of sodium thiosulfate is reacted with calcium chloride...concn solutions of calcium thiosulfate are prepared from ammonium thiosulfate and lime
Formulations/PreparationsCommercial dehydrated lime sulfur typically contains: 65-70% CaS4 and CaS5, ca 5% calcium thiosulfate, 5-10% free sulfur, and ca 20% inert ingredients
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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