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 : Methyl 4-(methylthio)benzoate/ (CAS: 3795-79-7)

    Code: JCKSM-218
    CAS: 3795-79-7
    Chemical Formula: C₉H₁₀O₂S
    Molecular Weight: 182.24
    Category:  KSM'S/Intermediates
    Literature:
    Application: Methyl 4-(methylthio)benzoate/ (CAS: 3795-79-7) is useful as reference Impurity standard.
    Methyl 4-(methylthio)benzoate/ (CAS: 3795-79-7)
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    Product Name : 4-(Methoxycarbonyl)pyridine 1-oxide; methyl Isonicotinate 1-oxide/ (CAS: 3783-38-8)

    Code: JCKSM-217
    CAS: 3783-38-8
    Chemical Formula: C7H7NO3
    Molecular Weight: 153.14
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-(Methoxycarbonyl)pyridine 1-oxide; methyl Isonicotinate 1-oxide/ (CAS: 3783-38-8) is useful as reference Impurity standard.
    4-(Methoxycarbonyl)pyridine 1-oxide; methyl Isonicotinate 1-oxide/ (CAS: 3783-38-8)
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    Product Name : 2,5-difluoroaniline/ (CAS: 367-30-6)

    Code: JCKSM-216
    CAS: 367-30-6
    Chemical Formula: C6H5F2N 
    Molecular Weight: 129.11 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2,5-difluoroaniline/ (CAS: 367-30-6) is useful as reference Impurity standard.
    2,5-difluoroaniline/ (CAS: 367-30-6)
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    Product Name : 4-Bromo-2-fluoroaniline/ (CAS: 367-24-8)

    Code: JCKSM-215
    CAS:  367-24-8
    Chemical Formula: C6H5BrFN
    Molecular Weight: 190.01
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Bromo-2-fluoroaniline/ (CAS: 367-24-8) is useful as reference Impurity standard.
    4-Bromo-2-fluoroaniline/ (CAS: 367-24-8)
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    Product Name : 1-benzhydrylazetidine-3-carboxylic acid; 1-(Diphenylmethyl)azetidine-3-carboxylic Acid/ (CAS: 36476-87-6)

    Code: JCKSM-214
    CAS:  36476-87-6
    Chemical Formula: C17H17NO2
    Molecular Weight: 267.32
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-benzhydrylazetidine-3-carboxylic acid/ (CAS: 36476-87-6) is useful as reference Impurity standard.
    1-benzhydrylazetidine-3-carboxylic acid; 1-(Diphenylmethyl)azetidine-3-carboxylic Acid/ (CAS: 36476-87-6)
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    Product Name : 1-benzhydrylazetidine-3-carbonitrile; 1-(Diphenylmethyl)azetidine-3-carbonitrile/ (CAS: 36476-86-5)

    Code: JCKSM-213
    CAS:  36476-86-5
    Chemical Formula: C17H16N2
    Molecular Weight: 248.33
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-benzhydrylazetidine-3-carbonitrile/ (CAS: 36476-86-5) is useful as reference Impurity standard.
    1-benzhydrylazetidine-3-carbonitrile; 1-(Diphenylmethyl)azetidine-3-carbonitrile/ (CAS: 36476-86-5)
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    Product Name : 1,4-difluoro-2-nitrobenzene; 2,5-Difluoronitrobenzene/ (CAS: 364-74-9)

    Code: JCKSM-212
    CAS: 364-74-9
    Chemical Formula: C6H3F2NO2 
    Molecular Weight: 159.09 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1,4-difluoro-2-nitrobenzene; 2,5-Difluoronitrobenzene/ (CAS: 364-74-9) is useful as reference Impurity standard.
    1,4-difluoro-2-nitrobenzene; 2,5-Difluoronitrobenzene/ (CAS: 364-74-9)
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    Product Name : 2-Methyl-1-(thiophen-2-yl)propan-1-one/ (CAS: 36448-60-9)

    Code: JCKSM-211
    CAS: 36448-60-9
    Chemical Formula: C8H10OS
    Molecular Weight: 154.23
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-Methyl-1-(thiophen-2-yl)propan-1-one/ (CAS: 36448-60-9) is useful as reference Impurity standard.
    2-Methyl-1-(thiophen-2-yl)propan-1-one/ (CAS: 36448-60-9)
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    Product Name : (3-butoxyphenyl)boronic acid/ (CAS: 352534-81-7)

    Code: JCKSM-210
    CAS: 352534-81-7
    Chemical Formula: C10H15BO3 
    Molecular Weight: 194.04  
    Category:  KSM'S/Intermediates
    Literature:
    Application: (3-butoxyphenyl)boronic acid/ (CAS: 352534-81-7) is useful as reference Impurity standard.
    (3-butoxyphenyl)boronic acid/ (CAS: 352534-81-7)
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    Product Name : (3-(Trifluoromethyl)phenyl)methanol/ (CAS: 349-75-7)

    Code: JCKSM-209
    CAS: 349-75-7
    Chemical Formula: C8H7F3O 
    Molecular Weight: 176.14 
    Category:  KSM'S/Intermediates
    Literature:
    Application: (3-(Trifluoromethyl)phenyl)methanol/ (CAS: 349-75-7) is useful as reference Impurity standard.
    (3-(Trifluoromethyl)phenyl)methanol/ (CAS: 349-75-7)
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    Product Name : 1-bromo-4-(methylsulfonyl)benzene; 4-Bromophenyl methyl sulfone/ (CAS: 3466-32-8)

    Code: JCKSM-208
    CAS: 3466-32-8
    Chemical Formula: C7H7BrO2S
    Molecular Weight: 235.10
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-bromo-4-(methylsulfonyl)benzene; 4-Bromophenyl methyl sulfone/ (CAS: 3466-32-8) is useful as reference Impurity standard.
    1-bromo-4-(methylsulfonyl)benzene; 4-Bromophenyl methyl sulfone/ (CAS: 3466-32-8)
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    Product Name : N-(4-Bromo-2-chlorophenyl)acetamide/ (CAS: 3460-23-9)

    Code: JCKSM-207
    CAS: 3460-23-9
    Chemical Formula: C8H7BrClNO 
    Molecular Weight:  248.50 
    Category:  KSM'S/Intermediates
    Literature:
    Application: N-(4-Bromo-2-chlorophenyl)acetamide/ (CAS: 3460-23-9) is useful as reference Impurity standard.
    N-(4-Bromo-2-chlorophenyl)acetamide/ (CAS: 3460-23-9)
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    Product Name : Tetrahydro-2H-pyran-4-carboxamide/ (CAS: 344329-76-6)

    Code: JCKSM-206
    CAS: 344329-76-6
    Chemical Formula: C₆H₁₁NO₂  
    Molecular Weight:  129.16
    Category:  KSM'S/Intermediates
    Literature:
    Application: Tetrahydro-2H-pyran-4-carboxamide/ (CAS: 344329-76-6) is useful as reference Impurity standard.
    Tetrahydro-2H-pyran-4-carboxamide/ (CAS: 344329-76-6)
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    Product Name : 2,2′-bis(trifluoromethyl)-[1,1′-biphenyl]-4,4′-diamine; 4,4′-Diamino-2,2′-bis(trifluoromethyl)biphenyl/ (CAS: 341-58-2)

    Code: JCKSM-205
    CAS: 341-58-2
    Chemical Formula:  C14H10F6N2 
    Molecular Weight:  320.24 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2,2'-bis(trifluoromethyl)-[1,1'-biphenyl]-4,4'-diamine/ (CAS: 341-58-2) is useful as reference Impurity standard.
    2,2'-bis(trifluoromethyl)-[1,1'-biphenyl]-4,4'-diamine; 4,4'-Diamino-2,2'-bis(trifluoromethyl)biphenyl/ (CAS: 341-58-2)
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    Product Name : Ethyl 3-bromo-2-fluorobenzoate/ (CAS: 334792-76-6)

    Code: JCKSM-204
    CAS: 334792-76-6
    Chemical Formula:  C9H8BrFO2
    Molecular Weight:  247.06
    Category:  KSM'S/Intermediates
    Literature:
    Application: Ethyl 3-bromo-2-fluorobenzoate/ (CAS: 334792-76-6) is useful as reference Impurity standard.
    Ethyl 3-bromo-2-fluorobenzoate/ (CAS: 334792-76-6)
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    Product Name : 1-benzhydrylazetidin-3-yl methanesulfonate/ (CAS: 33301-41-6)

    Code: JCKSM-203
    CAS: 33301-41-6
    Chemical Formula:  C17H19NO3S
    Molecular Weight:  3170.40
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-benzhydrylazetidin-3-yl methanesulfonate/ (CAS: 33301-41-6) is useful as reference Impurity standard.
    1-benzhydrylazetidin-3-yl methanesulfonate/ (CAS: 33301-41-6)
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    Product Name : Ethyl 5-hydroxy-3,6-dihydro-2H-pyran-4-carboxylate/ (CAS: 324767-92-2)

    Code: JCKSM-202
    CAS: 324767-92-2
    Chemical Formula: C8H12O4
    Molecular Weight:  172.18
    Category:  KSM'S/Intermediates
    Literature:
    Application: Ethyl 5-hydroxy-3,6-dihydro-2H-pyran-4-carboxylate/ (CAS: 324767-92-2) is useful as reference Impurity standard.
    Ethyl 5-hydroxy-3,6-dihydro-2H-pyran-4-carboxylate/ (CAS: 324767-92-2)
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    Product Name : (Z)‑4‑(3‑(3,5‑dichlorophenyl)‑4,4,4‑trifluorobut‑2‑enonyl)‑2‑methyl‑benzonitrile/(CAS: 2734714-72-6)

    Code: JCKSM-201
    CAS: 2734714-72-6
    Chemical Formula: C18H10Cl2F3NO
    Molecular Weight:  384.185
    Category:  KSM'S/Intermediates
    Literature:
    Application: (Z)‑4‑(3‑(3,5‑dichlorophenyl)‑4,4,4‑trifluorobut‑2‑enonyl)‑2‑methyl‑benzonitrile/(CAS: 2734714-72-6) is useful as reference Impurity standard.
    (Z)‑4‑(3‑(3,5‑dichlorophenyl)‑4,4,4‑trifluorobut‑2‑enonyl)‑2‑methyl‑benzonitrile/(CAS: 2734714-72-6)
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    Product Name : Pentaerythritol tetrabromide; 1,3-Dibromo-2,2-bis(bromomethyl)propane Tetrakis(bromomethyl)methane/(CAS: 3229-00-3)

    Code: JCKSM-200
    CAS: 3229-00-3
    Chemical Formula: C5H8Br4 
    Molecular Weight:  387.74 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Pentaerythritol tetrabromide/(CAS: 3229-00-3) is useful as reference Impurity standard.
    Pentaerythritol tetrabromide; 1,3-Dibromo-2,2-bis(bromomethyl)propane Tetrakis(bromomethyl)methane/(CAS: 3229-00-3)
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    Product Name : 1-Chloro-2-fluoro-4-(trifluoromethyl)benzene; 4-Chloro-3-fluorobenzotrifluoride Thumbnail of 4-Chloro-3-fluorobenzotrifluoride/(CAS: 32137-20-5)

    Code: JCKSM-199
    CAS: 32137-20-5
    Chemical Formula: C7H3ClF4
    Molecular Weight:  198.54 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 1-Chloro-2-fluoro-4-(trifluoromethyl)benzene/(CAS: 32137-20-5) is useful as reference Impurity standard.
    1-Chloro-2-fluoro-4-(trifluoromethyl)benzene; 4-Chloro-3-fluorobenzotrifluoride Thumbnail of 4-Chloro-3-fluorobenzotrifluoride/(CAS: 32137-20-5)
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    Product Name : Methyl (2-nitrophenyl)sulfane/ (CAS: 3058-47-7)

    Code: JCKSM-198
    CAS: 3058-47-7
    Chemical Formula: C7H7NO2S
    Molecular Weight:  169.20
    Category:  KSM'S/Intermediates
    Literature:
    Application: Methyl (2-nitrophenyl)sulfane/ (CAS: 3058-47-7) is useful as reference Impurity standard.
    Methyl (2-nitrophenyl)sulfane/ (CAS: 3058-47-7)
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    Product Name : 2-bromothiazole; 2-Thiazolyl Bromide/(CAS: 3034-53-5)

    Code: JCKSM-197
    CAS: 3034-53-5
    Chemical Formula: C3H2BrNS 
    Molecular Weight: 164.02 
    Category:  KSM'S/Intermediates
    Literature:
    Application: 2-bromothiazole; 2-Thiazolyl Bromide/(CAS: 3034-53-5) is useful as reference Impurity standard.
    2-bromothiazole; 2-Thiazolyl Bromide/(CAS: 3034-53-5)
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    Product Name : Ethyl 4-bromobutyrate; 4-Bromobutyric Acid Ethyl Ester/(CAS: 2969-81-5)

    Code: JCKSM-196
    CAS: 2969-81-5
    Chemical Formula: C6H11BrO2
    Molecular Weight: 195.06 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Ethyl 4-bromobutyrate; 4-Bromobutyric Acid Ethyl Ester/(CAS: 2969-81-5) is useful as reference Impurity standard.
    Ethyl 4-bromobutyrate; 4-Bromobutyric Acid Ethyl Ester/(CAS: 2969-81-5)
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    Product Name : 4-chloro-2-(methylthio)aniline/ (CAS: 29690-21-9)

    Code: JCKSM-195
    CAS: 29690-21-9
    Chemical Formula: C7H8ClNS
    Molecular Weight: 173.66
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-chloro-2-(methylthio)aniline/ (CAS: 29690-21-9) is useful as reference Impurity standard.
    4-chloro-2-(methylthio)aniline/ (CAS: 29690-21-9)
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    Product Name : methyl 4-methylthiophene-2-carboxylate/ (CAS: 28686-90-0)

    Code: JCKSM-194
    CAS: 28686-90-0
    Chemical Formula: C7H8O2S
    Molecular Weight: 156.20
    Category:  KSM'S/Intermediates
    Literature:
    Application: methyl 4-methylthiophene-2-carboxylate/ (CAS: 28686-90-0) is useful as reference Impurity standard.
    methyl 4-methylthiophene-2-carboxylate/ (CAS: 28686-90-0)
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    Product Name : 2-Aminobenzophenone (CAS: 2835-77-0)

    Code: JCKSM-193
    CAS: 2835-77-0
    Chemical Formula: C13H11NO
    Molecular Weight: 197.24
    Category:  KSM'S/Intermediates
    Status: Limited Stock; Contact: sales@drjcrbio.com
    Application: Manufacturer of  2-Aminobenzophenone (CAS: 2835-77-0) is useful as reference Impurity standard. Note: The compounds strictly supplied only for R&D /AR&D purpose, not for human/animal consumption.
    2-Aminobenzophenone (CAS: 2835-77-0)
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    Product Name : 3-Bromophenethyl alcohol; 2-(3-Bromophenyl)ethanol/ (CAS: 28229-69-8)

    Code: JCKSM-192
    CAS: 28229-69-8
    Chemical Formula: C8H9BrO
    Molecular Weight: 201.06
    Category:  KSM'S/Intermediates
    Literature:
    Application: 3-Bromophenethyl alcohol; 2-(3-Bromophenyl)ethanol/ (CAS: 28229-69-8) is useful as reference Impurity standard.
    3-Bromophenethyl alcohol; 2-(3-Bromophenyl)ethanol/ (CAS: 28229-69-8)
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    Product Name : 4-Formyl-2-methylbenzonitrile/ (CAS: 27613-35-0)

    Code: JCKSM-191
    CAS: 27613-35-0
    Chemical Formula: C9H7NO
    Molecular Weight: 145.16
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Formyl-2-methylbenzonitrile/ (CAS: 27613-35-0) is useful as reference Impurity standard.
    4-Formyl-2-methylbenzonitrile/ (CAS: 27613-35-0)
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    Product Name : (2-bromo-5-chlorophenyl)(methyl)sulfane; 1-bromo-4-chloro-2-methylsulfanylbenzene/ (CAS: 255051-34-4)

    Code: JCKSM-190
    CAS: 255051-34-4
    Chemical Formula: C₇H₆BrClS
    Molecular Weight: 237.54
    Category:  KSM'S/Intermediates
    Literature:
    Application: (2-bromo-5-chlorophenyl)(methyl)sulfane; 1-bromo-4-chloro-2-methylsulfanylbenzene/ (CAS: 255051-34-4) is useful as reference Impurity standard.
    (2-bromo-5-chlorophenyl)(methyl)sulfane; 1-bromo-4-chloro-2-methylsulfanylbenzene/ (CAS: 255051-34-4)
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    Product Name : 4-Morpholinoaniline; 4-(4-Aminophenyl)morpholine/ (CAS: 2524-67-6)

    Code: JCKSM-189
    CAS: 2524-67-6
    Chemical Formula: C10H14N2O
    Molecular Weight:  178.24
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Morpholinoaniline; 4-(4-Aminophenyl)morpholine/ (CAS: 2524-67-6) is useful as reference Impurity standard.
    4-Morpholinoaniline; 4-(4-Aminophenyl)morpholine/ (CAS: 2524-67-6)
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    Product Name : Methyl isonicotinate; Isonicotinic Acid Methyl Ester;Pyridine-4-carboxylic Acid Methyl Ester/(CAS: 2459-09-8)

    Code: JCKSM-188
    CAS: 2459-09-8
    Chemical Formula: C7H7NO2 
    Molecular Weight:  137.14 
    Category:  KSM'S/Intermediates
    Literature:
    Application: Methyl isonicotinate; Isonicotinic Acid Methyl Ester;Pyridine-4-carboxylic Acid Methyl Ester/(CAS: 2459-09-8) is useful as reference Impurity standard.
    Methyl isonicotinate; Isonicotinic Acid Methyl Ester;Pyridine-4-carboxylic Acid Methyl Ester/(CAS: 2459-09-8)
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    Product Name : 4-Bromo-2-methylbenzaldehyde/ (CAS: 24078-12-4)

    Code: JCKSM-187
    CAS: 24078-12-4
    Chemical Formula: C8H7BrO
    Molecular Weight:  199.04
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-Bromo-2-methylbenzaldehyde/ (CAS: 24078-12-4) is useful as reference Impurity standard.
    4-Bromo-2-methylbenzaldehyde/ (CAS: 24078-12-4)
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    Product Name : 4-tert-Butylbenzenethiol; 4-tert-Butylthiophenol/ (CAS: 2396-68-1)

    Code: JCKSM-186
    CAS: 2396-68-1
    Chemical Formula: C10H14S
    Molecular Weight:  166.28
    Category:  KSM'S/Intermediates
    Literature:
    Application: 4-tert-Butylbenzenethiol; 4-tert-Butylthiophenol/ (CAS: 2396-68-1) is useful as reference Impurity standard.
    4-tert-Butylbenzenethiol; 4-tert-Butylthiophenol/ (CAS: 2396-68-1)
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