KSM'S

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KSM'S API Reference standards and its EP Impurities, USP Impurities, non pharmacopeial Impurities, listed below & also offered custom synthesis for unknown Impurities. If require any contact info@drjcrbio.com, sales@drjcrbio.com

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    Product Name : Benzenethiol, 2-(2-methylpropyl)/ 1454580-70-1

    Code: JCKSM-145
    CAS: 1454580-70-1
    Chemical Formula: C10H14S
    Molecular Weight: 166.283
    Category: KSM'S/Intermediates
    Literature:
    Application: Benzenethiol, 2-(2-methylpropyl) is useful as reference Impurity standard
    Benzenethiol, 2-(2-methylpropyl)/ 1454580-70-1
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    Product Name : 2-Methoxythiazole/ 14542-13-3

    Code: JCKSM-144
    CAS: 14542-13-3
    Chemical Formula: C4H5NOS
    Molecular Weight: 115.15
    Category: KSM'S/Intermediates
    Literature:
    Application: 2-Methoxythiazole is useful as reference Impurity standard
    2-Methoxythiazole/ 14542-13-3
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    Product Name : trans-3-Bromocinnamic Acid/ 14473-91-7

    Code: JCKSM-143
    CAS: 14473-91-7
    Chemical Formula: C9H7BrO2
    Molecular Weight: 227.06
    Category: KSM'S/Intermediates
    Literature:
    Application: trans-3-Bromocinnamic Acid is useful as reference Impurity standard
    trans-3-Bromocinnamic Acid/ 14473-91-7
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    Product Name : 4-Amino-2-chloropyridine/ 14432-12-3

    Code: JCKSM-142
    CAS: 14432-12-3
    Chemical Formula: C5H5ClN2
    Molecular Weight: 128.56
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-Amino-2-chloropyridine is useful as reference Impurity standard
    4-Amino-2-chloropyridine/ 14432-12-3
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    Product Name : 4-Methyl-2-thiophenecarboxylic acid/ 14282-78-1

    Code: JCKSM-141
    CAS: 14282-78-1
    Chemical Formula: C6H6O2S
    Molecular Weight: 142.18
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-Methyl-2-thiophenecarboxylic acid is useful as reference Impurity standard
    4-Methyl-2-thiophenecarboxylic acid/ 14282-78-1
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    Product Name : 7-Bromobenzo[b]thiophene/ 1423-61-6

    Code: JCKSM-140
    CAS: 1423-61-6
    Chemical Formula: C8H5BrS
    Molecular Weight: 213.09
    Category: KSM'S/Intermediates
    Literature:
    Application: 7-Bromobenzo[b]thiophene is useful as reference Impurity standard
    7-Bromobenzo[b]thiophene/ 1423-61-6
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    Product Name : 1-(tert-Butoxycarbonyl)azetidine-3-carboxylic Acid/ 142253-55-2

    Code: JCKSM-139
    CAS: 142253-55-2
    Chemical Formula: C9H15NO4
    Molecular Weight: 201.22
    Category: KSM'S/Intermediates
    Literature:
    Application:1-(tert-Butoxycarbonyl)azetidine-3-carboxylic Acid is useful as reference Impurity standard
    1-(tert-Butoxycarbonyl)azetidine-3-carboxylic Acid/ 142253-55-2
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    Product Name : tert-Butyl 3-[(Methylsulfonyl)oxy]azetidine-1-carboxylate/ 141699-58-3

    Code: JCKSM-138
    CAS: 141699-58-3
    Chemical Formula: C9H17NO5S
    Molecular Weight: 251.30
    Category: KSM'S/Intermediates
    Literature:
    Application: tert-Butyl 3-[(Methylsulfonyl)oxy]azetidine-1-carboxylate is useful as reference Impurity standard
    tert-Butyl 3-[(Methylsulfonyl)oxy]azetidine-1-carboxylate/ 141699-58-3
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    Product Name : tert-Butyl 3-cyanoazetidine-1-carboxylate/ 142253-54-1

    Code: JCKSM-137
    CAS: 142253-54-1
    Chemical Formula: C₉H₁₄N₂O₂
    Molecular Weight: 182.22
    Category: KSM'S/Intermediates
    Literature:
    Application: tert-Butyl 3-cyanoazetidine-1-carboxylate is useful as reference Impurity standard
    tert-Butyl 3-cyanoazetidine-1-carboxylate/ 142253-54-1
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    Product Name : 1-(tert-Butoxycarbonyl)-3-hydroxyazetidine/ 141699-55-0

    Code: JCKSM-136
    CAS: 141699-55-0 
    Chemical Formula: C8H15NO3
    Molecular Weight: 173.21
    Category: KSM'S/Intermediates
    Literature:
    Application: 1-(tert-Butoxycarbonyl)-3-hydroxyazetidine is useful as reference Impurity standard
    1-(tert-Butoxycarbonyl)-3-hydroxyazetidine/ 141699-55-0
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    Product Name : 2,4-Dimethylbenzenethiol/ 13616-82-5

    Code: JCKSM-135
    CAS: 13616-82-5
    Chemical Formula: C8H10S
    Molecular Weight: 138.23
    Category: KSM'S/Intermediates
    Literature:
    Application: 2,4-Dimethylbenzenethiol is useful as reference Impurity standard
    2,4-Dimethylbenzenethiol/ 13616-82-5
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    Product Name : 1,3-Dihydroxynaphthalene/ 132-86-5

    Code: JCKSM-134
    CAS: 132-86-5 
    Chemical Formula: C10H8O2
    Molecular Weight: 160.17
    Category: KSM'S/Intermediates
    Literature:
    Application: 1,3-Dihydroxynaphthalene is useful as reference Impurity standard
    1,3-Dihydroxynaphthalene/ 132-86-5
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    Product Name : 2-(3-Chloroanilino)benzoic Acid/ 13278-36-9

    Code: JCKSM-133
    CAS: 13278-36-9
    Chemical Formula: C13H10ClNO2
    Molecular Weight: 247.68
    Category: KSM'S/Intermediates
    Literature:
    Application: 2-(3-Chloroanilino)benzoic Acid is useful as reference Impurity standard
    2-(3-Chloroanilino)benzoic Acid/ 13278-36-9
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    Product Name : 4-(Methylthio)benzoic Acid/ 13205-48-6

    Code: JCKSM-132
    CAS: 13205-48-6
    Chemical Formula: C8H8O2S
    Molecular Weight: 168.21
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-(Methylthio)benzoic Acid is useful as reference Impurity standard
    4-(Methylthio)benzoic Acid/ 13205-48-6
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    Product Name : Isopropylidenemalononitrile/ 13166-10-4

    Code: JCKSM-131
    CAS: 13166-10-4 
    Chemical Formula: C6H6N2
    Molecular Weight:  106.13
    Category: KSM'S/Intermediates
    Literature:
    Application: Isopropylidenemalononitrile is useful as reference Impurity standard
    Isopropylidenemalononitrile/ 13166-10-4
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    Product Name : 3′,5′-Dichloro-2,2,2-trifluoroacetophenone/ 130336-16-2

    Code: JCKSM-129
    CAS: 130336-16-2
    Chemical Formula: C8H3Cl2F3O
    Molecular Weight:  243.01
    Category: KSM'S/Intermediates
    Literature:
    Application: 3',5'-Dichloro-2,2,2-trifluoroacetophenone is useful as reference Impurity standard
    3',5'-Dichloro-2,2,2-trifluoroacetophenone/ 130336-16-2
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    Product Name : 2-(2-Chloropyridin-4-yl)propan-2-ol/ 1240620-98-7

    Code: JCKSM-128
    CAS: 1240620-98-7
    Chemical Formula: C8H10ClNO
    Molecular Weight:  171.62
    Category: KSM'S/Intermediates
    Literature:
    Application: 8-Bromo-1-chloroisoquinoline is useful as reference Impurity standard
    2-(2-Chloropyridin-4-yl)propan-2-ol/ 1240620-98-7
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    Product Name : 8-Bromo-1-chloroisoquinoline/ 1233025-78-9

    Code: JCKSM-127
    CAS: 1233025-78-9
    Chemical Formula: C9H5BrClN
    Molecular Weight:  242.50
    Category: KSM'S/Intermediates
    Literature:
    Application: 8-Bromo-1-chloroisoquinoline is useful as reference Impurity standard
    8-Bromo-1-chloroisoquinoline/ 1233025-78-9
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    Product Name : Quinoxaline-6-carbaldehyde/ 130345-50-5

    Code: JCKSM-130
    CAS: 130345-50-5
    Chemical Formula: C9H6N2O
    Molecular Weight:  158.157
    Category: KSM'S/Intermediates
    Literature:
    Application: Quinoxaline-6-carbaldehyde is useful as reference Impurity standard
    Quinoxaline-6-carbaldehyde/ 130345-50-5
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    Product Name : 3,4-Dimethoxyphenylboronic Acid (contains varying amounts of Anhydride)/ 122775-35-3

    Code: JCKSM-125
    CAS: 122775-35-3
    Chemical Formula: C8H11BO4
    Molecular Weight:  181.98
    Category: KSM'S/Intermediates
    Literature:
    Application: 3,4-Dimethoxyphenylboronic Acid (contains varying amounts of Anhydride) is useful as reference Impurity standard
    3,4-Dimethoxyphenylboronic Acid (contains varying amounts of Anhydride)/ 122775-35-3
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    Product Name : 3-Amino-4-chlorobenzotrifluoride/ 121-50-6

    Code: JCKSM-124
    CAS: 121-50-6 
    Chemical Formula: C7H5ClF3N
    Molecular Weight:  195.57
    Category: KSM'S/Intermediates
    Literature:
    Application: 3-Amino-4-chlorobenzotrifluoride is useful as reference Impurity standard
    3-Amino-4-chlorobenzotrifluoride/ 121-50-6
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    Product Name : 4-Chloro-3-nitrobenzotrifluoride/ 121-17-5

    Code: JCKSM-122
    CAS: 121-17-5
    Chemical Formula: C7H3ClF3NO2
    Molecular Weight:  225.55
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-Chloro-3-nitrobenzotrifluoride/121-17-5  is useful as reference Impurity standard
    4-Chloro-3-nitrobenzotrifluoride/ 121-17-5
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    Product Name : 2,2′-Dibenzothiazolyl Disulfide/ 120-78-5

    Code: JCKSM-123
    CAS: 120-78-5
    Chemical Formula: C14H8N2S4
    Molecular Weight: 332.47
    Category: KSM'S/Intermediates
    Literature:
    Application: 2,2'-Dibenzothiazolyl Disulfide is useful as reference Impurity standard
    2,2'-Dibenzothiazolyl Disulfide/ 120-78-5
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    Product Name : (E)-3-(1-Methyl-1h-pyrrol-2-yl)acrylic acid/ 119924-13-9

    Code: JCKSM-121
    CAS:119924-13-9
    Chemical Formula: C8H9O2N1
    Molecular Weight: 151.16
    Category: KSM'S/Intermediates
    Literature:
    Application: (E)-3-(1-Methyl-1h-pyrrol-2-yl)acrylic acid is useful as reference Impurity standard
    (E)-3-(1-Methyl-1h-pyrrol-2-yl)acrylic acid/ 119924-13-9
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    Product Name : 2-Hydroxyquinoxaline/ 1196-57-2

    Code: JCKSM-120
    CAS: 1196-57-2
    Chemical Formula: C8H6N2O
    Molecular Weight: 146.15
    Category: KSM'S/Intermediates
    Literature:
    Application: 2-Hydroxyquinoxaline is useful as reference Impurity standard
    2-Hydroxyquinoxaline/ 1196-57-2
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    Product Name : 3-methylthieno[2,3-c]pyridin-7-ol/ 1196156-29-2

    Code: JCKSM-119
    CAS: 1196156-29-2
    Chemical Formula: C8H7O1N1S1
    Molecular Weight: 165.22
    Category: KSM'S/Intermediates
    Literature:
    Application: 3-methylthieno[2,3-c]pyridin-7-ol is useful as reference Impurity standard
    3-methylthieno[2,3-c]pyridin-7-ol/ 1196156-29-2
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    Product Name : 2,3,5,6-Tetrachloronitrobenzene/ 117-18-0

    Code: JCKSM-118
    CAS: 117-18-0 
    Chemical Formula: C6HCl4NO2
    Molecular Weight: 260.88
    Category: KSM'S/Intermediates
    Literature:
    Application: 2,3,5,6-Tetrachloronitrobenzene is useful as reference Impurity standard
    2,3,5,6-Tetrachloronitrobenzene/ 117-18-0
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    Product Name : 2-Amino-N-(2,2,2-trifluoroethyl)acetamide HCl/ 1171331-39-7

    Code: JCKSM-117
    CAS: 1171331-39-7
    Chemical Formula: C4H8O1N2Cl1F3
    Molecular Weight: 192.57
    Category: KSM'S/Intermediates
    Literature:
    Application: 2-Amino-N-(2,2,2-trifluoroethyl)acetamide HCl is useful as reference Impurity standard
    2-Amino-N-(2,2,2-trifluoroethyl)acetamide HCl/ 1171331-39-7
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    Product Name : 2-Amino-4′-bromobenzophenone/ 1140-17-6

    Code: JCKSM-116
    CAS: 1140-17-6
    Chemical Formula: C13H10BrNO
    Molecular Weight: 276.13
    Category: KSM'S/Intermediates
    Literature:
    Application: 2-Amino-4'-bromobenzophenone/ 1140-17-6 is useful as reference Impurity standard
    2-Amino-4'-bromobenzophenone/ 1140-17-6
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    Product Name : 4-(Methylthio)aniline/ 104-96-1

    Code: JCKSM-115
    CAS: 104-96-1
    Chemical Formula: C7H9NS
    Molecular Weight: 139.22
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-(Methylthio)aniline / 104-96-1 is useful as reference Impurity standard
    4-(Methylthio)aniline/ 104-96-1
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    Product Name : 4-Acetyl-2-methylbenzonitrile/ 1138444-80-0

    Code: JCKSM-114
    CAS: 1138444-80-0
    Chemical Formula: C10H9O1N1
    Molecular Weight: 159.19
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-Acetyl-2-methylbenzonitrile/1138444-80-0  is useful as reference Impurity standard
    4-Acetyl-2-methylbenzonitrile/ 1138444-80-0
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    Product Name : 4-Bromo-1-iodo-2-nitrobenzene/ 112671-42-8

    Code: JCKSM-113
    CAS: 112671-42-8
    Chemical Formula: C7H12O3
    Molecular Weight: 327.9
    Category: KSM'S/Intermediates
    Literature:
    Application: 4-Bromo-1-iodo-2-nitrobenzene/112671-42-8  is useful as reference Impurity standard
    4-Bromo-1-iodo-2-nitrobenzene/ 112671-42-8
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    Product Name : Methyl tetrahydropyran-4-carboxylate/ 110238-91-0

    Code: JCKSM-112
    CAS: 110238-91-0
    Chemical Formula: C7H12O3
    Molecular Weight:144.17
    Category: KSM'S/Intermediates
    Literature:
    Application: Methyl tetrahydropyran-4-carboxylate/110238-91-0 is useful as reference Impurity standard
    Methyl tetrahydropyran-4-carboxylate/ 110238-91-0
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