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Dayang Chem (Hangzhou) Co., Ltd.
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Product Name: Perthiocyanic acid
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20939-17-7

20939-17-7 structure

20939-17-7 structure

Name: Perthiocyanic acid
Chemical Name: 1,2,4-thiadiazolidine-3,5-dithione
CAS Number: 20939-17-7
Molecular Formula: C₂H₂N₂S₃
Molecular Weight: 150.24600
Create Date: 2016-09-15 20:35:51
Modify Date: 2025-09-18 18:08:45

Name	1,2,4-thiadiazolidine-3,5-dithione
Synonyms	1,2,4-Thiadiazole-3,5-dithiol Perthiocyanic acid

Density	1.276g/cm3
Boiling Point	42.238ºC at 760 mmHg
Molecular Formula	C₂H₂N₂S₃
Molecular Weight	150.24600
Flash Point	-20.654ºC
Exact Mass	149.93800
PSA	124.00000
LogP	1.86330
Vapour Pressure	394.633mmHg at 25°C
Index of Refraction	1.464

CHEMICAL IDENTIFICATION

RTECS NUMBER :: XI4817000

CHEMICAL NAME :: 1,2,4-Thiadiazolidine-3,5-dithione

CAS REGISTRY NUMBER :: 20939-17-7

LAST UPDATED :: 199406

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C2-H2-N2-S3

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD - Lethal dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >500 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: NCNSA6 National Academy of Sciences, National Research Council, Chemical-Biological Coordination Center, Review. (Washington, DC) Volume(issue)/page/year: 5,24,1953

HS Code	2934999090

Precursor 0
DownStream 2
6846-35-1 7783-06-4

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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