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ChemicalBook >> CAS DataBase List >>5-Amino-1,3,4-thiadiazole-2-thiol

5-Amino-1,3,4-thiadiazole-2-thiol

CAS No.
2349-67-9
Chemical Name:
5-Amino-1,3,4-thiadiazole-2-thiol
Synonyms
2-Amino-5-mercapto-1,3,4-thiadiazole;2-Amino-5-mercapto-1,3,4-thiad;2-Mercapto-5-amino-1,3,4-thiadiazole;1,3,4-Thiadiazole-2(3H)-thione, 5-amino-;EAMTD;nsc21402;NSC 21402;usafpd-25;USAF pd-25;Acetazolamide EP Impurity G
CBNumber:
CB1360123
Molecular Formula:
C2H3N3S2
Molecular Weight:
133.2
MDL Number:
MFCD00003108
MOL File:
2349-67-9.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-07-20 23:19:27
Product description Number Pack Size Price
5-Amino-1,3,4-thiadiazole-2-thiol 98% 127906 50g $88.6
2-Amino-5-mercapto-1,3,4-thiadiazole >98.0%(HPLC)(T) A0425 25g $22
2-Amino-5-mercapto-1,3,4-thiadiazole >98.0%(HPLC)(T) A0425 500g $187
5-Amino-1,3,4-thiadiazole-2-thiol TRC-A633300-1G 1g $71
5-Amino-1,3,4-thiadiazole-2-thiol TRC-A633300-100G 100g $172
More product size

5-Amino-1,3,4-thiadiazole-2-thiol Properties

Melting point 235 °C (dec.)(lit.)
Boiling point 242.3±23.0 °C(Predicted)
Density 1.503 (estimate)
refractive index 1.5800 (estimate)
storage temp. Keep in dark place,Sealed in dry,Room Temperature
solubility 2g/l
form Powder
pka 7.80±0.20(Predicted)
color White or pale yellow to cream
PH 3.9 (2g/l, H2O, 20℃)
Water Solubility insoluble
BRN 81728
InChI 1S/C2H3N3S2/c3-1-4-5-2(6)7-1/h(H2,3,4)(H,5,6)
InChIKey GDGIVSREGUOIJZ-UHFFFAOYSA-N
SMILES Nc1nnc(S)s1
CAS DataBase Reference 2349-67-9(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII B1HEG7V21S
NIST Chemistry Reference 2-Amino-5-mercapto-1,3,4-thiadiazole(2349-67-9)
EPA Substance Registry System 1,3,4-Thiadiazole-2(3H)-thione, 5-amino- (2349-67-9)
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P301+P312+P330-P302+P352-P305+P351+P338
target organs Respiratory system
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi,Xn
Risk Statements  36/37/38-22-20/21/22
Safety Statements  26-36-36/37
WGK Germany  3
RTECS  XI4550000
F  9-13-23
Hazard Note  Irritant
TSCA  TSCA listed
HS Code  29349990
Storage Class 11 - Combustible Solids
Hazard Classifications Acute Tox. 4 Oral
Eye Irrit. 2
Skin Irrit. 2
STOT SE 3
REACH Registrations Inactive
NFPA 704
1
2 0

5-Amino-1,3,4-thiadiazole-2-thiol price More Price(72)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 127906 5-Amino-1,3,4-thiadiazole-2-thiol 98% 2349-67-9 50g $88.6 2023-01-07 Buy
TCI Chemical A0425 2-Amino-5-mercapto-1,3,4-thiadiazole >98.0%(HPLC)(T) 2349-67-9 25g $22 2026-04-30 Buy
TCI Chemical A0425 2-Amino-5-mercapto-1,3,4-thiadiazole >98.0%(HPLC)(T) 2349-67-9 500g $187 2026-04-30 Buy
TRC TRC-A633300-1G 5-Amino-1,3,4-thiadiazole-2-thiol 2349-67-9 1g $71 2026-06-03 Buy
TRC TRC-A633300-100G 5-Amino-1,3,4-thiadiazole-2-thiol 2349-67-9 100g $172 2026-06-03 Buy
Product number Packaging Price Buy
127906 50g $88.6 Buy
A0425 25g $22 Buy
A0425 500g $187 Buy
TRC-A633300-1G 1g $71 Buy
TRC-A633300-100G 100g $172 Buy

5-Amino-1,3,4-thiadiazole-2-thiol Chemical Properties,Uses,Production

Chemical Properties

White or pale yellow to cream powder

Uses

5-amino-1,3,4-thiadiazole-2-thiol was used to prepare new amines exhibiting anti-convulsant activity.

Uses

5-Amino-1,3,4-thiadiazole-2-thiol is a thiadiazole derivative with antibacterial acitivity used in the preparation of herbicides as well as carbonic anhydrase inhibitors.

Synthesis

Carbon disulfide

75-15-0

thiosemicarbazide

79-19-6

5-Amino-1,3,4-thiadiazole-2-thiol

2349-67-9

2-Amino-5-mercapto-1,3,4-thiadiazole was synthesized as follows: in a three-necked flask equipped with a stirrer, 5.5 g (0.06 mol) of aminothiourea, 20 mL of N,N-dimethylformamide (DMF), and 3 mL (0.1 mol) of carbon disulfide were added sequentially. The reaction mixture was heated to reflux and maintained for 4 hours. After completion of the reaction, the mixture was cooled to room temperature. To the reaction mixture was added 40 mL of 2 mol/L sodium hydroxide solution followed by decolorization. After decolorization, concentrated hydrochloric acid was slowly added to acidic conditions to precipitate the crude product. The crude product was purified by recrystallization from 50% ethanol to give 5.7 g of bright yellow needle-like crystals of 2-amino-5-mercapto-1,3,4-thiadiazole in 67.4% yield.

References

[1] Journal of Chemical Research, 2010, # 11, p. 619 - 621
[2] Chemical Biology and Drug Design, 2012, vol. 80, # 4, p. 598 - 604
[3] European Journal of Medicinal Chemistry, 2006, vol. 41, # 8, p. 918 - 924
[4] Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2010, vol. 49, # 2, p. 241 - 246
[5] Chemical Biology and Drug Design, 2013, vol. 81, # 5, p. 666 - 673

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View Lastest Price from 5-Amino-1,3,4-thiadiazole-2-thiol manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
5-Amino-1,3,4-thiadiazole-2-thiol pictures 2026-07-20 5-Amino-1,3,4-thiadiazole-2-thiol
2349-67-9
 1kg 98% 1000kgs Shaanxi Dideu New Materials Co. Ltd
5-Amino-1,3,4-thiadiazole-2-thiol pictures 2026-07-01 5-Amino-1,3,4-thiadiazole-2-thiol
2349-67-9
 $15.00-21.00 10kg 98% 300tons Hebei Dangtong Import and export Co LTD
5-Amino-1,3,4-thiadiazole-2-thiol pictures 2026-03-20 5-Amino-1,3,4-thiadiazole-2-thiol
2349-67-9
 $1.00 1kg 99% 10 mt Hebei Chuanghai Biotechnology Co., Ltd
2-Amino-1,3,4-thiadiazole-5-mercaptan 2-Amino-1,3,4-thiadiazole-5-thiol 2-Amino-5-mercapto-1,3,4-thiadiazole(AMTD) 2-Amino-5-mercaptothiadiazole 2-amino-delta(2)-1,3,4-thiadiazoline-5-thione 2-Amino-delta2-1,3,4-thiadiazoline-5-thione 2-Thiol-5-amino-1,3,4-thiadiazole 3,4-Thiadiazole-2(3H)-thione,5-amino-1 Pesticide InterMediates 2-amino-5-mercapto-1,3,4-thiadiazol AMino - 5-2 - Mercapto - 1 and 4 - consult in 1 5-Amino-1,3,4-thiadiazole-2-thiol 98% 2-Amino-5-mercapto-1,3,4-thiadiazole for synthesis 5-Amino-1,3,4-thiadiazole-2-thiol 4-thiadiazole-2(3h)-thione,5-amino-3 4-thiadiazole-2-thiol,5-amino-3 5-amino-1,3,4-thiadiazole-2(3h)-thione 5-Amino-1,3,4-thiadiazoline-2-thione 2-amino-5-mrecapto-1,3,4-thiadiazol 2-AMINO-5-MERCAPTO-1,3,4-THIADIAZOLE /AMT 5-Amino-1,3,4-thiadiazole-2-thiol,98% 5-Amino-1,3,4-thiadi 2-AMino-5-Mercapto-1 5-AMino-1,3,4-thiadiazole-2-thiol, 98% 25GR 5-AMino-1,3,4-thiadiazole-2-thiol, 98% 50GR 2-AMINO-5-MERCAPTO-1,3,4-THIADIAZOLE FOR 2-Amino-5-mercapto-1,3,4-thiadiazole, 5-Amino-1,3,4-thiadiazole-2-thiol 2-Amino-5-thio-1,3,4-thiadiazole 2-Amino-5-mercapto-1,3,4-thiadiazole, 98+% 5-Amino-1,3,4-thiazole-2-thiol 2-amino thiadiazole-5-thiol 5-Mercapto-1,3,4-thiadiazole-2-amine 5-Mercapto-2-amino-1,3,4-thiadiazole 2-amino-5-mercapto-1,3,4-triazole AMTD 2-Amino-5-mercapto-1,3,4-thiadiazole 5-Amino-1,3,4-thiadiazole-2(3H)-thione Solution, 100ppm Acetazolamide Impurity 7(Acetazolamide EP Impurity G) 5-Amino-1,3,4-thiadiazoL e-2-thioL 2-Amino-5-mercapto-1,3,4-thiadiazole > 5-Amino-1,3,4-thiadiazole-2(3H)-thione Solution in Methanol, 100μg/mL 5-AMINO-1,3,4-THIADIAZOLE-2-THIOL 2349-67-9 Acetazolamide Impurity 7 ACETYLAMINE(2-)-5-MERCAPTO-1,3,4-THIADAZOLE 1,3,4-Thiadiazole-2(3H)-thione, 5-amino- 1,3,4-Thiadiazole-2-thiol, 5-amino- 5-Amino-2-mercapto-1,3,4-thiadiazole 5-Amino-2-thiol-1,3,4-thiadiazole 5-Amino-3H-[1,3,4]thiadiazole-2-thione delta2-1,3,4-Thiadiazoline-2-thiol, 5-imino- NSC 21402 nsc21402 USAF pd-25 usafpd-25 EAMTD 2-amino-5-mercapto-1,3,4-thiiodiazole 5-amino-1,3,,4-thialiazoline-2(3H)-thione 2-Amino-5-mercapto-1,3,4-thiad
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