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ChemicalBook >> CAS DataBase List >> 3-Methylisothiazole-4-carboxylic acid

3-Methylisothiazole-4-carboxylic acid

3-Methylisothiazole-4-carboxylic acid price.
  • $12 - $1988
  • Product name: 3-Methylisothiazole-4-carboxylic acid
  • CAS: 15903-66-9
  • MF: C5H5NO2S
  • MW: 143.16
  • EINECS:
  • MDL Number:MFCD00030523
  • Synonyms:3-Methylisothiazole-4-carboxylic acid;3-Methyl-4-isothiazolecarboxylic acid;3-Methyl-1,2-thiazole-4-carboxylic acid;4-Isothiazolecarboxylic acid, 3-methyl-;3-methyl-1,2-thiazole-4-carboxylic acid - [M83293]
Price41 Properties Safety Information Description
41 prices
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  • aablocks
  • ACHEMBLOCK
  • Acints
  • Activate Scientific
  • Advanced Chemicals Intermediat
  • AK Scientific
  • Alichem
  • Ambeed
  • American Custom Chemicals Corporation
  • Arctom
  • Biosynth
  • Chemenu
  • Crysdot
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Package
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  • Manufactureraablocks
  • Product numberAA001QCO
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging100mg
  • Price$12
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA001QCO
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging250mg
  • Price$16
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA001QCO
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging1g
  • Price$57
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA001QCO
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging5g
  • Price$194
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA001QCO
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging10g
  • Price$387
  • Updated2026-05-28
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  • ManufacturerACHEMBLOCK
  • Product numberU133058
  • Product description3-methyl-1,2-thiazole-4-carboxylic acid 97%
  • Packaging5G
  • Price$295
  • Updated2026-05-27
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  • ManufacturerACHEMBLOCK
  • Product numberU133058
  • Product description3-methyl-1,2-thiazole-4-carboxylic acid 97%
  • Packaging25G
  • Price$1180
  • Updated2026-05-27
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  • ManufacturerAcints
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging5g
  • Price$633.15
  • Updated2026-05-20
  • Buy
  • ManufacturerAcints
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging1g
  • Price$202.5
  • Updated2026-05-20
  • Buy
  • ManufacturerAcints
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging500mg
  • Price$126.9
  • Updated2026-05-20
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS68572
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging1g
  • Price$133
  • Updated2026-06-04
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS68572
  • Product description3-Methylisothiazole-4-carboxylic acid 95%
  • Packaging5g
  • Price$388
  • Updated2026-06-04
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  • ManufacturerAdvanced Chemicals Intermediat
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging5g
  • Price$633.15
  • Updated2026-05-19
  • Buy
  • ManufacturerAdvanced Chemicals Intermediat
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging1g
  • Price$202.5
  • Updated2026-05-19
  • Buy
  • ManufacturerAdvanced Chemicals Intermediat
  • Product numberACI-00941
  • Product description3-Methyl-isothiazole-4-carboxylic acid 95%+
  • Packaging500mg
  • Price$126.9
  • Updated2026-05-19
  • Buy
  • ManufacturerAK Scientific
  • Product numberY7681
  • Product description3-Methylisothiazole-4-carboxylic acid
  • Packaging10g
  • Price$1988
  • Updated2021-12-16
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA001QCO 3-Methylisothiazole-4-carboxylic acid 95% 100mg $12 2026-05-28 Buy
aablocks AA001QCO 3-Methylisothiazole-4-carboxylic acid 95% 250mg $16 2026-05-28 Buy
aablocks AA001QCO 3-Methylisothiazole-4-carboxylic acid 95% 1g $57 2026-05-28 Buy
aablocks AA001QCO 3-Methylisothiazole-4-carboxylic acid 95% 5g $194 2026-05-28 Buy
aablocks AA001QCO 3-Methylisothiazole-4-carboxylic acid 95% 10g $387 2026-05-28 Buy
ACHEMBLOCK U133058 3-methyl-1,2-thiazole-4-carboxylic acid 97% 5G $295 2026-05-27 Buy
ACHEMBLOCK U133058 3-methyl-1,2-thiazole-4-carboxylic acid 97% 25G $1180 2026-05-27 Buy
Acints ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 5g $633.15 2026-05-20 Buy
Acints ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 1g $202.5 2026-05-20 Buy
Acints ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 500mg $126.9 2026-05-20 Buy
Activate Scientific AS68572 3-Methylisothiazole-4-carboxylic acid 95% 1g $133 2026-06-04 Buy
Activate Scientific AS68572 3-Methylisothiazole-4-carboxylic acid 95% 5g $388 2026-06-04 Buy
Advanced Chemicals Intermediat ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 5g $633.15 2026-05-19 Buy
Advanced Chemicals Intermediat ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 1g $202.5 2026-05-19 Buy
Advanced Chemicals Intermediat ACI-00941 3-Methyl-isothiazole-4-carboxylic acid 95%+ 500mg $126.9 2026-05-19 Buy
AK Scientific Y7681 3-Methylisothiazole-4-carboxylic acid 10g $1988 2021-12-16 Buy
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Properties

Melting point :235.5-237.5 °C
Boiling point :91.5-93 °C(Press: 3 Torr)
Density :1.418±0.06 g/cm3(Predicted)
storage temp. :Sealed in dry,Room Temperature
form :solid
pka :1.78±0.25(Predicted)
Appearance :Off-white to yellow Solid
InChI :1S/C5H5NO2S/c1-3-4(5(7)8)2-9-6-3/h2H,1H3,(H,7,8)
InChIKey :BOTUFHIAKJCIPY-UHFFFAOYSA-N
SMILES :CC1=NSC=C1C(O)=O

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
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

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Suppliers and manufacturers

J & K SCIENTIFIC LTD. Shanghai Hanhong Scientific Co.,Ltd. Shanghai Ennopharm Co., Ltd. Atop-Pharma (Shanghai) Technology Co., Ltd. Sense Chemicals (Shanghai) Co., Ltd. Shanghai PharmOrgsyn Technology Co., LTD. Jiangsu Aikon Biopharmaceutical R&D co.,Ltd. Shanghai Qing Cang Chemical Technology Co., Ltd. Shanghai YuanYe Biotechnology Co., Ltd. Amadis Chemical Company Limited