Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: USAF K-1338
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Purity: 98.0%
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37929-27-4

37929-27-4 structure

Name: USAF K-1338
Chemical Name: 3,4,6,6-tetramethyl-1H-pyrimidine-2-thione
CAS Number: 37929-27-4
Molecular Formula: C₈H₁₄N₂S
Molecular Weight: 170.27500
Create Date: 2016-12-24 13:55:13
Modify Date: 2025-09-22 10:08:31

Name	3,4,6,6-tetramethyl-1H-pyrimidine-2-thione
Synonyms	2-Thio-1,4,4,6-tetramethyl dihydropyrimidine USAF K-1338 N1-Methyl-4,4,6-trimethyl-2-thiono-1,2,3,4-tetrahydro-pyrimidin 1.4.4.6-Tetramethyl-3,4-dihydro-1H-pyrimidin-2-thion 1,4,4,6-tetramethyl-3,4-dihydro-1H-pyrimidine-2-thione

Density	1.09g/cm3
Boiling Point	212.6ºC at 760 mmHg
Molecular Formula	C₈H₁₄N₂S
Molecular Weight	170.27500
Flash Point	82.4ºC
Exact Mass	170.08800
PSA	47.36000
LogP	1.75540
Index of Refraction	1.574

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UW4725000

CHEMICAL NAME :: 2(1H)-Pyrimidinethione, 3,4-dihydro-1,4,4,6-tetramethyl-

CAS REGISTRY NUMBER :: 37929-27-4

LAST UPDATED :: 199012

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C8-H14-N2-S

MOLECULAR WEIGHT :: 170.30

WISWESSER LINE NOTATION :: T6MYN FHJ BUS C1 D1 F1 F1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 200 mg/kg

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

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: AD277-689

HS Code	2933599090

27406-60-6

~95%

37929-27-4

Literature: Singh, Harjit; Singh, Paramjit Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 1013 - 1018

27248-25-5

37929-27-4

Literature: Kim, Yong Hae; Lim, Byoung Uk Tetrahedron Letters, 1991 , vol. 32, # 18 p. 2057 - 2060

141-79-7

598-52-7

~9%

58544-50-6

37929-27-4

Literature: Singh, Harjit; Singh, Paramjit Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 1013 - 1018

141-79-7

598-52-7

37929-27-4

Literature: Willems; Vandenberghe Ind. chim. belge Sonderband 31. Congr. int. Chim. ind. Luettich, 1958 , p. Bd. 2, S. 476, 479 Full Text Show Details Zigeuner et al. Monatshefte fuer Chemie, 1975 , vol. 106, p. 1219,1230

74-89-5

27248-25-5

~6%

37929-27-4

27406-60-6

Literature: Singh, Harjit; Singh, Paramjit Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 1013 - 1018

Precursor 5
27406-60-6 27248-25-5 141-79-7 598-52-7
74-89-5
DownStream 5
598-52-7 58544-50-6 58913-37-4 16312-21-3
4695-28-7

HS Code	2933599090
Summary	2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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