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 : 5-Amino-2-fluorobenzonitrile; 3-Cyano-4-fluoroaniline (CAS: 53312-81-5)

    Code: JCKSM-372
    CAS:  53312-81-5
    Chemical Formula: C7H5FN2 
    Molecular Weight:  136.13 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 5-Amino-2-fluorobenzonitrile; 3-Cyano-4-fluoroaniline (CAS: 53312-81-5) is useful as reference Impurity standard.
    5-Amino-2-fluorobenzonitrile; 3-Cyano-4-fluoroaniline (CAS: 53312-81-5)
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    Product Name : Atromentin; 2,5-Dihydroxy-3,6-bis(4-hydroxyphenyl)-2,5-cyclohexadiene-1,4-dione (CAS: 519-67-5)

    Code: JCKSM-371
    CAS:  519-67-5
    Chemical Formula: C18H12O6
    Molecular Weight:  324.28
    Category:  KSM'S/Intermediates
    Literature:
    Application: Atromentin; 2,5-Dihydroxy-3,6-bis(4-hydroxyphenyl)-2,5-cyclohexadiene-1,4-dione (CAS: 519-67-5) is useful as reference Impurity standard.
    Atromentin; 2,5-Dihydroxy-3,6-bis(4-hydroxyphenyl)-2,5-cyclohexadiene-1,4-dione (CAS: 519-67-5)
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    Product Name : 3,4-Dihydroxy-5-methoxybenzaldehyde; 5-Hydroxyvanillin (CAS: 3934-87-0)

    Code: JCKSM-370
    CAS:  3934-87-0
    Chemical Formula:  C8H8O4 
    Molecular Weight:  168.15 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3,4-Dihydroxy-5-methoxybenzaldehyde; 5-Hydroxyvanillin (CAS: 3934-87-0) is useful as reference Impurity standard.
    3,4-Dihydroxy-5-methoxybenzaldehyde; 5-Hydroxyvanillin (CAS: 3934-87-0)
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    Product Name : 3-Bromo-4-hydroxy-5-methoxybenzaldehyde; 5-Bromovanillin (CAS: 2973-76-4)

    Code: JCKSM-369
    CAS:  2973-76-4
    Chemical Formula:  C8H7BrO3 
    Molecular Weight:  231.05 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3-Bromo-4-hydroxy-5-methoxybenzaldehyde (CAS: 2973-76-4) is useful as reference Impurity standard.
    3-Bromo-4-hydroxy-5-methoxybenzaldehyde; 5-Bromovanillin (CAS: 2973-76-4)
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    Product Name : 4-(Dimethylamino)butyraldehyde Dimethyl Acetal; 4,4-Dimethoxy-N,N-dimethylbutylamine (CAS: 19718-92-4)

    Code: JCKSM-368
    CAS:  19718-92-4
    Chemical Formula:  C8H19NO2 
    Molecular Weight:  161.25 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-(Dimethylamino)butyraldehyde Dimethyl Acetal (CAS: 19718-92-4) is useful as reference Impurity standard.
    4-(Dimethylamino)butyraldehyde Dimethyl Acetal; 4,4-Dimethoxy-N,N-dimethylbutylamine (CAS: 19718-92-4)
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    Product Name : Neopentyl Iodide; 1-Iodo-2,2-dimethylpropane (CAS: 15501-33-4)

    Code: JCKSM-367
    CAS:  15501-33-4
    Chemical Formula:  C5H11I
    Molecular Weight:  198.05
    Category:  KSM'S/Intermediates
    Literature:
    Application: Neopentyl Iodide; 1-Iodo-2,2-dimethylpropane (CAS: 15501-33-4) is useful as reference Impurity standard.
    Neopentyl Iodide; 1-Iodo-2,2-dimethylpropane (CAS: 15501-33-4)
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    Product Name : 4-Phenylazo-1-naphthylamine; Naphthyl Red; Solvent Yellow 4 (CAS: 131-22-6)

    Code: JCKSM-366
    CAS:  131-22-6
    Chemical Formula: C16H13N3 
    Molecular Weight:  247.30 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Phenylazo-1-naphthylamine; Naphthyl Red; Solvent Yellow 4 (CAS: 131-22-6) is useful as reference Impurity standard.
    4-Phenylazo-1-naphthylamine; Naphthyl Red; Solvent Yellow 4 (CAS: 131-22-6)
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    Product Name : Trioctyl Phosphite; Phosphorous Acid Trioctyl Ester (CAS: 3028-88-4)

    Code: JCKSM-365
    CAS:  3028-88-4
    Chemical Formula: C24H51O3P 
    Molecular Weight:  418.64 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Trioctyl Phosphite; Phosphorous Acid Trioctyl Ester (CAS: 3028-88-4)  is useful as reference Impurity standard.
    Trioctyl Phosphite; Phosphorous Acid Trioctyl Ester (CAS: 3028-88-4)
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    Product Name : 2-Methyl-3-hexanone; Isopropyl Propyl Ketone (CAS: 7379-12-6)

    Code: JCKSM-364
    CAS:  7379-12-6
    Chemical Formula: C7H14O 
    Molecular Weight:  114.19 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-Methyl-3-hexanone; Isopropyl Propyl Ketone (CAS: 7379-12-6)  is useful as reference Impurity standard.
    2-Methyl-3-hexanone; Isopropyl Propyl Ketone (CAS: 7379-12-6)
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    Product Name : 3-(Methylthio)aniline (CAS: 1783-81-9)

    Code: JCKSM-363
    CAS: 1783-81-9
    Chemical Formula: C7H9NS  
    Molecular Weight:  139.22
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3-(Methylthio)aniline (CAS: 1783-81-9) is useful as reference Impurity standard.
    3-(Methylthio)aniline (CAS: 1783-81-9)
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    Product Name : Methyl(3-nitrophenyl)sulfane; 1-(Methylsulfanyl)-3-nitrobenzene (CAS: 2524-76-7)

    Code: JCKSM-362
    CAS: 2524-76-7
    Chemical Formula:  C7H7NO2S
    Molecular Weight:  169.20
    Category:  KSM'S/Intermediates
    Literature:
    Application: Methyl(3-nitrophenyl)sulfane; 1-(Methylsulfanyl)-3-nitrobenzene (CAS: 2524-76-7) is useful as reference Impurity standard.
    Methyl(3-nitrophenyl)sulfane; 1-(Methylsulfanyl)-3-nitrobenzene (CAS: 2524-76-7)
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    Product Name : 1-(Methylsulfonyl)-3-nitrobenzene (CAS: 2976-32-1)

    Code: JCKSM-361
    CAS: 2976-32-1
    Chemical Formula:  C7H7O4N1S1
    Molecular Weight:  201.2
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-(Methylsulfonyl)-3-nitrobenzene (CAS: 2976-32-1) is useful as reference Impurity standard.
    1-(Methylsulfonyl)-3-nitrobenzene (CAS: 2976-32-1)
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    Product Name : 2-((3-Nitrophenyl)sulfonyl)ethanol (CAS: 41687-30-3)

    Code: JCKSM-360
    CAS: 41687-30-3
    Chemical Formula:  C8H9NO5S
    Molecular Weight:  231.23
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-((3-Nitrophenyl)sulfonyl)ethanol (CAS: 41687-30-3) is useful as reference Impurity standard.
    2-((3-Nitrophenyl)sulfonyl)ethanol (CAS: 41687-30-3)
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    Product Name : 3-Nitrobenzenethiol (CAS: 3814-18-4)

    Code: JCKSM-359
    CAS: 3814-18-4
    Chemical Formula:  C6H5NO2S
    Molecular Weight:  155.17
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3-Nitrobenzenethiol (CAS: 3814-18-4) is useful as reference Impurity standard.
    3-Nitrobenzenethiol (CAS: 3814-18-4)
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    Product Name : 2-[(3-Aminophenyl)sulfonyl]ethanol (CAS: 5246-57-1)

    Code: JCKSM-358
    CAS: 5246-57-1
    Chemical Formula:  C8H11NO3S 
    Molecular Weight:  201.24 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-[(3-Aminophenyl)sulfonyl]ethanol (CAS: 5246-57-1) is useful as reference Impurity standard.
    2-[(3-Aminophenyl)sulfonyl]ethanol (CAS: 5246-57-1)
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    Product Name : Tris(dimethylamino)phosphine; Hexamethylphosphorous Triamide (CAS: 1608-26-0)

    Code: JCKSM-357
    CAS:  1608-26-0
    Chemical Formula: C6H18N3P 
    Molecular Weight:   163.20 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Tris(dimethylamino)phosphine (CAS: 1608-26-0) is useful as reference Impurity standard.
    Tris(dimethylamino)phosphine; Hexamethylphosphorous Triamide (CAS: 1608-26-0)
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    Product Name : 2-Methyl-1-nitroanthracene-9,10-dione (CAS: 129-15-7)

    Code: JCKSM-356
    CAS:  129-15-7
    Chemical Formula: C15H9NO4
    Molecular Weight:  267.24
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-Methyl-1-nitroanthracene-9,10-dione (CAS: 129-15-7) is useful as reference Impurity standard.
    2-Methyl-1-nitroanthracene-9,10-dione (CAS: 129-15-7)
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    Product Name : 2-(p-Toluenesulfonyl)acetic Acid (CAS: 3937-96-0)

    Code: JCKSM-355
    CAS:  3937-96-0
    Chemical Formula: C9H10O4S 
    Molecular Weight:  214.24
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-(p-Toluenesulfonyl)acetic Acid (CAS: 3937-96-0) is useful as reference Impurity standard.
    2-(p-Toluenesulfonyl)acetic Acid (CAS: 3937-96-0)
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    Product Name : 2-Methoxyethylamine; 2-Aminoethyl Methyl Ether; O-Methylethanolamine (CAS: 109-85-3)

    Code: JCKSM-354
    CAS:  109-85-3
    Chemical Formula:  C3H9NO 
    Molecular Weight:  75.11 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-Methoxyethylamine; 2-Aminoethyl Methyl Ether; O-Methylethanolamine (CAS: 109-85-3) is useful as reference Impurity standard.
    2-Methoxyethylamine; 2-Aminoethyl Methyl Ether; O-Methylethanolamine (CAS: 109-85-3)
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    Product Name : Ethyl N-Phenylformimidate; N-Ethoxymethyleneaniline; N-Phenylformimidic Acid Ethyl Ester (CAS: 6780-49-0)

    Code: JCKSM-353
    CAS:  6780-49-0
    Chemical Formula:  C9H11NO 
    Molecular Weight:   149.19 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Ethyl N-Phenylformimidate; N-Ethoxymethyleneaniline; N-Phenylformimidic Acid Ethyl Ester (CAS: 6780-49-0) is useful as reference Impurity standard.
    Ethyl N-Phenylformimidate; N-Ethoxymethyleneaniline; N-Phenylformimidic Acid Ethyl Ester (CAS: 6780-49-0)
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    Product Name : Bis(3-nitrophenyl) Disulfide; 3,3′-Dinitrodiphenyl Disulfide (CAS: 537-91-7)

    Code: JCKSM-352
    CAS:  537-91-7
    Chemical Formula:  C12H8N2O4S2 
    Molecular Weight:   308.33 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Bis(3-nitrophenyl) Disulfide; 3,3'-Dinitrodiphenyl Disulfide (CAS: 537-91-7) is useful as reference Impurity standard.
    Bis(3-nitrophenyl) Disulfide; 3,3'-Dinitrodiphenyl Disulfide (CAS: 537-91-7)
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    Product Name : 2-Methylanthraquinone; 2-Methylanthracene-9,10-Dione (Tectoquinone) (CAS: 84-54-8)

    Code: JCKSM-351
    CAS:  84-54-8
    Chemical Formula: C15H10O2 
    Molecular Weight:  222.24 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-Methylanthraquinone (CAS: 84-54-8) is useful as reference Impurity standard.
    2-Methylanthraquinone; 2-Methylanthracene-9,10-Dione (Tectoquinone) (CAS: 84-54-8)
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    Product Name : 1-Amino-2-methylanthraquinone; 1-Amino-2-methylanthracene-9,10-dione (CAS: 82-28-0)

    Code: JCKSM-350
    CAS:  82-28-0
    Chemical Formula: C15H11NO2 
    Molecular Weight:  237.26 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-Amino-2-methylanthraquinone (CAS: 82-28-0) is useful as reference Impurity standard.
    1-Amino-2-methylanthraquinone; 1-Amino-2-methylanthracene-9,10-dione (CAS: 82-28-0)
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    Product Name : 9-Anthraldehyde; 9-Anthracenecarboxaldehyde (CAS: 642-31-9)

    Code: JCKSM-349
    CAS:  642-31-9 
    Chemical Formula: C15H10O 
    Molecular Weight: 206.24 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 9-Anthraldehyde; 9-Anthracenecarboxaldehyde (CAS: 642-31-9) is useful as reference Impurity standard.
    9-Anthraldehyde; 9-Anthracenecarboxaldehyde (CAS: 642-31-9)
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    Product Name : Methyl 5-Acetyl-2-thiophenebutanoate; Methyl 4-(5-Acetylthiophen-2-yl)butanoate (CAS: 91971-11-8)

    Code: JCKSM-348
    CAS:  91971-11-8
    Chemical Formula: C11H14O3S 
    Molecular Weight: 226.29 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Methyl 5-Acetyl-2-thiophenebutanoate; Methyl 4-(5-Acetylthiophen-2-yl)butanoate (CAS: 91971-11-8) is useful as reference Impurity standard.
    Methyl 5-Acetyl-2-thiophenebutanoate; Methyl 4-(5-Acetylthiophen-2-yl)butanoate (CAS: 91971-11-8)
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    Product Name : 6-Thioguanine; 2-Amino-6-mercaptopurine; 6-Mercaptoguanine (CAS: 154-42-7)

    Code: JCKSM-347
    CAS:  154-42-7
    Chemical Formula:  C5H5N5S 
    Molecular Weight:   167.19 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 6-Thioguanine; 2-Amino-6-mercaptopurine (CAS: 154-42-7) is useful as reference Impurity standard.
    6-Thioguanine; 2-Amino-6-mercaptopurine; 6-Mercaptoguanine (CAS: 154-42-7)
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    Product Name : 1-Ethyl-3-pyrrolidinol; 1-Ethyl-3-hydroxypyrrolidine (CAS: 30727-14-1)

    Code: JCKSM-346
    CAS:  30727-14-1
    Chemical Formula:  C6H13NO 
    Molecular Weight:   115.18  
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-Ethyl-3-pyrrolidinol; 1-Ethyl-3-hydroxypyrrolidine (CAS: 30727-14-1) is useful as reference Impurity standard.
    1-Ethyl-3-pyrrolidinol; 1-Ethyl-3-hydroxypyrrolidine (CAS: 30727-14-1)
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    Product Name : (5-Chloro-2-formylphenyl)boronic Acid; 5-Chloro-2-formylbenzeneboronic Acid (CAS: 870238-36-1)

    Code: JCKSM-345
    CAS:  870238-36-1
    Chemical Formula:  C7H6BClO3 
    Molecular Weight:    184.38 
    Category:  KSM'S/Intermediates
    Literature:
    Application: (5-Chloro-2-formylphenyl)boronic Acid (CAS: 870238-36-1)  is useful as reference Impurity standard.
    (5-Chloro-2-formylphenyl)boronic Acid; 5-Chloro-2-formylbenzeneboronic Acid (CAS: 870238-36-1)
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    Product Name : 2,6-Di-tert-butyl-4-methoxyphenol; 3,5-Di-tert-butyl-4-hydroxyanisole (CAS: 489-01-0)

    Code: JCKSM-344
    CAS:  489-01-0
    Chemical Formula:  C15H24O2 
    Molecular Weight:   236.36 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2,6-Di-tert-butyl-4-methoxyphenol; 3,5-Di-tert-butyl-4-hydroxyanisole (CAS: 489-01-0)  is useful as reference Impurity standard.
    2,6-Di-tert-butyl-4-methoxyphenol; 3,5-Di-tert-butyl-4-hydroxyanisole (CAS: 489-01-0)
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    Product Name : 3,3′,5,5′-Tetra-tert-butyl-[1,1′-biphenyl]-4,4′-diol (CAS: 128-38-1)

    Code: JCKSM-343
    CAS:  128-38-1
    Chemical Formula:  C28H42O2 
    Molecular Weight:   410.64 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3,3',5,5'-Tetra-tert-butyl-[1,1'-biphenyl]-4,4'-diol (CAS: 128-38-1)  is useful as reference Impurity standard.
    3,3',5,5'-Tetra-tert-butyl-[1,1'-biphenyl]-4,4'-diol (CAS: 128-38-1)
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    Product Name : 3,3′,5,5′-Tetra-tert-butyl-[1,1′-bi(cyclohexylidene)]-2,2′,5,5′-tetraene-4,4′-dione (CAS: 2455-14-3)

    Code: JCKSM-342
    CAS:  2455-14-3
    Chemical Formula:  C28H40O2 
    Molecular Weight:   408.63 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3,3',5,5'-Tetra-tert-butyl-[1,1'-bi(cyclohexylidene)]-2,2',5,5'-tetraene-4,4'-dione (CAS: 2455-14-3)  is useful as reference Impurity standard.
    3,3',5,5'-Tetra-tert-butyl-[1,1'-bi(cyclohexylidene)]-2,2',5,5'-tetraene-4,4'-dione (CAS: 2455-14-3)
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    Product Name : 4-Bromo-2,6-di-tert-butylphenol; 2,6-Di-tert-butyl-4-bromophenol (CAS: 1139-52-2)

    Code: JCKSM-341
    CAS:  1139-52-2
    Chemical Formula:  C14H21BrO 
    Molecular Weight:  285.23 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Bromo-2,6-di-tert-butylphenol  (CAS: 1139-52-2) is useful as reference Impurity standard.
    4-Bromo-2,6-di-tert-butylphenol; 2,6-Di-tert-butyl-4-bromophenol (CAS: 1139-52-2)
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    Product Name : 2-((4-(Aminomethyl)benzyl)oxy)pyrimidin-4-amine (CAS: 1004524-64-4)

    Code: JCKSM-340
    CAS:  1004524-64-4
    Chemical Formula:  C12H14N4O
    Molecular Weight:  230.27
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-((4-(Aminomethyl)benzyl)oxy)pyrimidin-4-amine (CAS: 1004524-64-4) is useful as reference Impurity standard.
    2-((4-(Aminomethyl)benzyl)oxy)pyrimidin-4-amine (CAS: 1004524-64-4)
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