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Home > Encyclopedia > Calcium thiosulfate

Calcium thiosulfate

Calcium thiosulfate structure

Calcium thiosulfate 

structure
  • CAS No:

    10124-41-1

  • Formula:

    Ca.H2O3S2

  • Chemical Name:

    Calcium thiosulfate

  • Synonyms:

    Thiosulfuric acid (H2S2O3),calcium salt (1:1);Thiosulfuric acid,calcium salt (1:1);Calcium thiosulfate;Calcium thiosulfate (Ca(S2O3));Calcium hyposulfite;BSP Captor;15899-76-0;1307295-94-8

  • Categories:

    Agrochemicals  >  Fertilizers

Description

tricl crystal(s); when dry, decomposes on standing to form a yellow crust on the surface; spontaneously decomposed at 43°C–49°C; used to treat dermatitis and jaundice caused by arsphenamine [MER06]


Liquid

Calcium thiosulfate Basic Attributes

152.2062

151.891

233-333-7

2IO10O728E

DTXSID2034415

Characteristics

104

Liquid

1.87

decomposes [CRC10]

100g/100mL H2O (3°C), decomposed by hot water; insoluble alcohol

KEEP WELL CLOSED & IN A COOL PLACE. /HEXAHYDRATE/

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/

Safety Information

SPONTANEOUSLY DECOMPOSES @ 43-49 DEG C /HEXAHYDRATE/

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

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).

Toxicity

MINIMUM LETHAL DOSE RATS INTRAPERITONEAL 150 MG/KG BODY WEIGHT. /FROM TABLE/

Drug Information

3= MODERATELY TOXIC: PROBABLE ORAL LETHAL DOSE 0.5-5 G/KG, BETWEEN 1 OUNCE & 1 PINT (OR 1 LB) FOR 70 KG PERSON (150 LB). /THIOSULFATE SALTS/

REMARKABLY INERT IN VIVO, EXCEPT FOR OSMOTIC DISTURBANCES. POORLY ABSORBED FROM THE ALIMENTARY TRACT AND SO ACTS AS AN OSMOTIC CATHARTIC. /THIOSULFATE SALTS/

calcium thiosulfate

Calcium thiosulfate Use and Manufacturing

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

Uses

Agricultural chemicals (non-pesticidal)


Agricultural products (non-pesticidal)

Production

100,000,000 - 250,000,000 lb

Commercial dehydrated lime sulfur typically contains: 65-70% CaS4 and CaS5, ca 5% calcium thiosulfate, 5-10% free sulfur, and ca 20% inert ingredients

Mining (except oil and gas) and support activities|Thiosulfuric acid (H2S2O3), calcium salt (1:1): ACTIVE|PMN - indicates a commenced PMN (Pre-Manufacture Notices) substance.|INDUSTRIAL EFFLUENTS FROM METALLURGICAL PLANTS CONTAIN RESIDUAL CONCN OF NONFERROUS METALS. DISSOLVED SULFUR IN MILK OF LIME SOLN, CONTAINING CALCIUM POLYSULFATE 80 & CALCIUM THIOSULFATE 20%, IS USED AS THE PRECIPITATING AGENT.|Calcium thiosulfate is not produced commercially in the USA

NIOSH Method 7300, Elements (ICP), issued 2-15-84. INDUCTIVELY COUPLED ARGON PLASMA, ATOMIC EMISSION SPECTROSCOPY, detection limit = 2.5 to 1000 ug per sample /Calcium/|AOAC Method 920.199, Calcium in Water-Gravimetric Method. GRAV, detection limit not reported /Calcium/|APHA Method 3111, Metals by Flame Atomic Absorption Spectrometry. FLAA, detection limit 0.20 mg/L /Calcium/|APHA Method 3120, Metals by Plasma Emmission Spectroscopy. ICP, detection limit 10 ug/L /Calcium/|For more Analytic Laboratory Methods (Complete) data for CALCIUM THIOSULFATE (13 total), please visit the HSDB record page.

Computed Properties

Molecular Weight:152.2
Hydrogen Bond Acceptor Count:4
Exact Mass:151.8914771
Monoisotopic Mass:151.8914771
Topological Polar Surface Area:104
Heavy Atom Count:6
Complexity:82.6
Covalently-Bonded Unit Count:2
Compound Is Canonicalized:Yes

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