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ChemicalBook >> CAS DataBase List >> 5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid

5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid

5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid price.
  • $37 - $1022
  • Product name: 5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid
  • CAS: 101667-97-4
  • MF: C8H6N2O3S
  • MW: 210.21
  • EINECS:
  • MDL Number:MFCD00463620
  • Synonyms:5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid(SALTDATA: FREE);5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyriMidine-6-carboxylic;5-methyl-4-oxo-3H-thieno[2,3-d]pyrimidine-6-carboxylic acid;Thieno[2,3-d]pyrimidine-6-carboxylic acid, 1,4-dihydro-5-methyl-4-oxo-;5-methyl-4-oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid;5-Methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acid
Price25 Properties Safety Information Description
25 prices
Selected condition：
Brand
  • aablocks
  • ACHEMBLOCK
  • AK Scientific
  • American Custom Chemicals Corporation
  • ChemBridge Corporation
  • Chemenu
  • Crysdot
  • Matrix Scientific
  • TRC
Package
  • 50mg
  • 100mg
  • 250mg
  • 500.00mg
  • 500mg
  • 1.00g
  • 1g
  • 2.5g
  • 5G
  • 10g
  • 25g
  • Manufactureraablocks
  • Product numberAA000519
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging1g
  • Price$86
  • Updated2026-05-25
  • Buy
  • Manufactureraablocks
  • Product numberAA000519
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid ≥97%
  • Packaging50mg
  • Price$37
  • Updated2026-05-25
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberAD266167
  • Product description5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging1G
  • Price$205
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberAD266167
  • Product description5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging5G
  • Price$340
  • Updated2026-05-27
  • Buy
  • ManufacturerAK Scientific
  • Product number0434AA
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid
  • Packaging250mg
  • Price$238
  • Updated2021-12-16
  • Buy
  • ManufacturerAK Scientific
  • Product number0434AA
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid
  • Packaging2.5g
  • Price$332
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberNUC0001474
  • Product description5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00%
  • Packaging2.5G
  • Price$515
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberNUC0001474
  • Product description5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00%
  • Packaging5G
  • Price$595
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberNUC0001474
  • Product description5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00%
  • Packaging1G
  • Price$467
  • Updated2021-12-16
  • Buy
  • ManufacturerChemBridge Corporation
  • Product numberBB-4042969
  • Product description5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid 95%
  • Packaging250mg
  • Price$64
  • Updated2021-12-16
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging250mg
  • Price$200
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging500mg
  • Price$318
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging1g
  • Price$408
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging100mg
  • Price$140
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging50mg
  • Price$96
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM165751
  • Product description5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95%
  • Packaging5g
  • Price$672
  • Updated2026-05-26
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA000519 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 1g $86 2026-05-25 Buy
aablocks AA000519 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid ≥97% 50mg $37 2026-05-25 Buy
ACHEMBLOCK AD266167 5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid 95% 1G $205 2026-05-27 Buy
ACHEMBLOCK AD266167 5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid 95% 5G $340 2026-05-27 Buy
AK Scientific 0434AA 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid 250mg $238 2021-12-16 Buy
AK Scientific 0434AA 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid 2.5g $332 2021-12-16 Buy
American Custom Chemicals Corporation NUC0001474 5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00% 2.5G $515 2021-12-16 Buy
American Custom Chemicals Corporation NUC0001474 5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00% 5G $595 2021-12-16 Buy
American Custom Chemicals Corporation NUC0001474 5-METHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID 95.00% 1G $467 2021-12-16 Buy
ChemBridge Corporation BB-4042969 5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylicacid 95% 250mg $64 2021-12-16 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 250mg $200 2026-05-26 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 500mg $318 2026-05-26 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 1g $408 2026-05-26 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 100mg $140 2026-05-26 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 50mg $96 2026-05-26 Buy
Chemenu CM165751 5-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 95% 5g $672 2026-05-26 Buy
Next Last

Properties

Melting point :300 °C(Solv: 1,4-dioxane (123-91-1))
Boiling point :571.8±50.0 °C(Predicted)
Density :1.76±0.1 g/cm3(Predicted)
pka :3.72±0.20(Predicted)

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
Precautionary statements:
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P501 Dispose of contents/container to..…

Description

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Suppliers and manufacturers

J & K SCIENTIFIC LTD. Nanjing Habo Medical Technology Co., Ltd. Shanghai Aladdin Bio-Chem Technology Co.,LTD Clearsynth Labs Limited Shanghai YuanYe Biotechnology Co., Ltd. Amadis Chemical Company Limited Aikon International Limited CONIER CHEM AND PHARMA LIMITED Shanghai Haohong Scientific Co., Ltd. Nanjing Shizhou Biology Technology Co.,Ltd