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Simson Pharma Limited

Simson Pharma Limited
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Our Products

  1. Impurity Standards 69 Products available
  2. Lab Chemicals 46 Products available
  3. GC Standards 18 Products available
  4. Isotope Labelled Compounds 15 Products available
  5. Research Chemical 10 Products available
  6. Working Standards 6 Products available
  7. Metabolites 6 Products available
  8. Reference Standards 4 Products available
  9. Others Products 4 Products available

Impurity Standards

Our product range contains a wide range of Lamivudine EP Impurity A, Rabeprazole Sulfide, Dimenhydrinate EP Impurity A, Abacavir EP Impurity F and Mesalazine EP Impurity A

Lamivudine EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 173829-09-9
  • Molecular Formula C8H9N3O4S
  • Molecular Weight 243.24 g/ mol
  • Synonyms Lamivudine carboxylic acid ; (2R-Cis)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1, 3-oxathiolane-2-carboxylic acid
  • Chemical Name (2R, 5S)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1, 3-oxathiolane-2-carboxylic acid
  • Category Impurity Standards
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Rabeprazole Sulfide

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS No. 117977-21-6
  • Molecular Formula C18H21N3O2S
  • Molecular Weight 343.44 g/mol
  • Chemical Name 2-[[[3-Methyl-4-(3-methoxypropoxy)-2-pyridyl]methyl]thio]-1H-benzimidazole
  • Category Impurity Standards
Synonyms Rabeprazole EP Impurity B;2-[4-(3-Methoxypropoxy)-3-methylpyridine-2-yl]-methythio-1H-benzimidazole;Rabeprazole Thioether; USP Rabeprazole Related Compound E
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Dimenhydrinate EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 58-55-9
  • Molecular Formula C7H8N4O2
  • Molecular Weight 180.16 g/mol
  • Synonyms Theophylline
  • Chemical Name 1, 3-dimethyl-7H-purine-2, 6-dione
  • Category Impurity Standards
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Abacavir EP Impurity F

  • Country of Origin India
  • Molecular Formula C18H26N6O
  • Molecular Weight 342.44g/mol
  • Synonyms Abacavir EP Impurity F, Abacavir Impurities
  • Chemical Name N6-Cyclopropyl-9-[(1R, 4S)-4-[(1, 1-dimethylethoxy)methyl]-2-cyclopenten-1-yl]-9H-purine-2, 6-diamine
  • Category Impurity Standards

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Mesalazine EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C6H7NO
  • Molecular Weight 109.05g/mol
  • Synonyms Paracetamol EP Impurity K, Mesalazine EP Impurity A
  • Chemical Name 4-Aminophenol
  • Category Impurity Standards

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Metformin EP Impurity D

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C3H6N6
  • Molecular Weight 126.12g/mol
  • Synonyms Melamine, Cyanurotriamide
  • Chemical Name 1, 3, 5-Triazine-2, 4, 6-triamine
  • Category Impurity Standards

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Pantoprazole EP Impurity B

  • Country of Origin India
  • Molecular Weight 367.37g/mol
  • Molecular Formula C16H15F2N3O3S
  • Synonyms Pantoprazole EP Impurity B, Pantoprazole USP Related Compound B
  • Chemical Name 5-(Difluoromethoxy)-2-[[(3, 4-dimethoxy-2-pyridinyl)methyl]thio]-1H-benzimidazole
  • Category Impurity Standards

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Paracetamol EP Impurity F

  • Country of Origin India
  • Molecular Formula C6H5NO3
  • Molecular Weight 139.11g/mol
  • Synonyms Paracetamol EP Impurity F, p-Nitrophenol
  • Chemical Name 4-Nitrophenol
  • Category Impurity Standards

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N-Oxo Prucalopride

  • Molecular Formula C18H26ClN3O4
  • Molecular Weight 383.87g/mol
  • Category Impurity Standards
  • Synonyms N-Oxo Prucalopride
  • Chemical Name 4-Amino-5-chloro-2, 3-dihydro-N-[1-(3-methoxypropyl)-1-oxido-4-piperidinyl]-7-benzofurancarboxamide

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Metformin Hydrochloride EP Impurity-A

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 84.10 g/mol

CAS. No. 461-58-5 Molecular Formula C2H4N4 Molecular Weight 84.10 g/mol Synonyms Cyanoguanidine; Metformin USP Related compound- A Chemical Name N-Cyanoguanidine; 1-Cyanoguanidine; 2-Cyanoguanidine; Dicyandiamide; Dicyanodiamide

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Azithromycin Impurity-A(BP)

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 734.96 g/mol
CAS. No.76801-85-9 Molecular FormulaC37H70N2O12 Chemical Name9-Deoxo-9a-aza-9a-homo Erythromycin A(Desmethyl Azithromycin) Cat. No.A130001
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Colchicine Imp-EP D (Colchicoside)

  • Country of Origin India
  • Brand Name Simson Pharma
Cat. No.C650000 CAS. No.477-29-2 Molecular FormulaC27H33NO11 Molecular Weight547.55 g/mol SynonymsColchicine Impurity D; 3-Demethylcolchicine glucoside; colchicoside Chemical Name(S)-N-[3-(b-D-Glucopyranosyloxy)-5, 6, 7, 9-tetrahydro-1, 2, 10-trimethoxy-9-oxobenzo[a]heptalen-7-yl]acetamide; N-[(7S)-3-(b-D-Glucopyranosyloxy)-5, 6, 7, 9-tetrahydro-1, 2, 10-trimethoxy-9-oxobenzo[a]heptalen-7-yl]acetamide
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4'-(azidomethyl)-[1,1'-biphenyl]-2-carbonitrile

Cat. No.I030037 CAS. No.133690-91-2 Molecular FormulaC14H10N4 Molecular Weight234.26 g/mol Chemical Name4'-(azidomethyl)-[1, 1'-biphenyl]-2-carbonitrile
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Metronidazole Benzoate EP Impurity B

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 127.10 g/mol
Cat. No.M130002 CAS. No.696-23-1 Molecular FormulaC4H5N3O2 Synonyms2-Methyl-4(5)-nitroimidazole; 2-Methyl-4-nitroimidazole Chemical Name2-Methyl-5-nitroimidazole
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Metformin EP Impurity E Hydrochloride

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 115.14 g/mol
Cat. No.M020006A CAS. No.1674-62-0 Molecular FormulaC3H9N5.HCl SynonymsMetformin USP Related Compound B Chemical NameN-methyl-Imidodicarbonimidic diamide hydrochloride
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Acetylcysteine Impurity C

  • Country of Origin India
  • Brand Name Simson Pharma
Cat. No.A310003 CAS. No.5545-17-5 Molecular FormulaC10H16N2O6S2 Molecular Weight324.37 g/mol SynonymsN, N-Diacetyl-L-cystine; Acetylcysteine EP Impurity C Chemical NameN, N-Diacetylcystine
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4-Azidomethyl-2'-cyanobiphenyl

  • Molecular Formula C14H10N4
  • Molecular Weight 234.26 g/mol
  • Category Impurity Standards
  • CAS. No. 133690-91-2
  • Chemical Name 4'-(azidomethyl)-[1, 1'-biphenyl]-2-carbonitrile
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Amitriptyline EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 1210-35-1
  • Molecular Formula C15H12O
  • Molecular Weight 208.26 g/mol
  • Synonyms Dibenzosuberan-5-one; Dibenzocycloheptadienone; 5-Dibenzosuberone; Amitriptyline USP Related Compound A
  • Chemical Name 10, 11-Dihydro-5H-dibenzo[a, d]cyclohepten-5-one; 10, 11-Dihydrodibenzo[a, d]cyclohepten-5-one
  • Category Impurity Standards
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(±)-trans-lamivudine Diastereoisomers

  • Molecular Formula C8H₁₁N3O3S
  • Molecular Weight 229.26 g/mol
  • Category Impurity Standards
  • CAS. No. 139757-68-9
  • Synonyms trans-2-Hydroxymethyl-5-(cytosin-1-yl)-1, 3-oxathiolane
  • Chemical Name rel-4-amino-1-((2R, 5R)-2-(hydroxymethyl)-1, 3-oxathiolan-5-yl)pyrimidin-2(1H)-one
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Guaifenesin EP Impurity B

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 198.22 g/mol
  • CAS. No. 14007-09-1
  • Molecular Formula C10H14O4
  • Chemical Name 2-(2-Methoxyphenoxy)-1, 3-propanediol
Synonyms 2-(o-Methoxyphenoxy)-1, 3-propanediol
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Atorvastatin EP Impurity C

  • Country of Origin India
  • Brand Name Simson Pharma
Cat. No.A120014 CAS. No.693793-20-6 Molecular FormulaC66H66CaF2N4O10 Molecular Weight1191.32 g/mol SynonymsAtorvastatin Related Compound C Chemical Name(3R, 5R)-7-(2, 3-bis(4-fluorophenyl)-5-isopropyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3, 5-dihydroxyheptanoate hemicalcium salt
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Carvedilol EP Impurity C

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 72955-94-3
  • Molecular Formula C31H32N2O4
  • Molecular Weight 496.6g/mol
  • Synonyms 1-(9H-Carbazol-4-yloxy)-3-[[2-(2-methoxyphenoxy)ethyl](phenylmethyl)amino]-2-propanol; Carvedilol EP Impurity C; Carvedilol USP Related Compound C
  • Chemical Name (2RS)-1-[benzyl[2-(2-methoxyphenoxy)ethyl]amino]-3-(9H-carbazol-4-yloxy)propan-2-ol.
  • Category Impurity Standards
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Levetiracetam USP Related Compound A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 102767-31-7
  • Molecular Formula C8H15ClN2O2
  • Molecular Weight 206.67 g/ mol
  • Synonyms N-[(1S)-1-(Aminocarbonyl)propyl]-4-chlorobutanamide; (S)-N-[1-(Aminocarbonyl)propyl]-4-chlorobutanamide
  • Chemical Name (S)-N-(1-amino-1-oxobutan-2-yl)-4-chlorobutanamide
  • Category Impurity Standards
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Atorvastatin EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C66H70CaN4O10
  • Molecular Weight 1119.36g/mol
  • Synonyms Atorvastatin USP Related Compd A
  • Chemical Name (3R, 5R)-7-[3-(Phenylcarbamoyl)-5-phenyl-2-isopropyl-4-phenyl-1H-pyrrol-1-yl]-3, 5- dihydroxyheptanoic acid Calcium salt
  • Category Impurity Standards

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Atorvastatine EP Impurity D

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C26H22FNO4
  • Molecular Weight 431.46g/mol
  • Synonyms USP Atorvastatin Related Impurity D
  • Chemical Name 3-(4-Fluorobenzoyl)-2-(2-methyl-1-oxopropyl)-N, 3-diphenyloxiranecarboxamide
  • Category Impurity Standards

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Duloxetine EP Impurity F (oxalate)

  • Country of Origin India
  • Molecular Formula C18H19NOS.C2H2O4
  • Molecular Weight 387.45 g/mol
  • Synonyms Duloxetine 3-Thiophene Isomer, Duloxetine USP RC F
  • Chemical Name N-methyl-3-(naphthalene-1-yloxy)-3-(thiophene-3-yl)propan-1-amine oxalate
  • Category Impurity Standards

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Fluorouracil EP ImpurityD

  • Country of Origin India
  • Molecular Formula C5H6N2O3
  • Molecular Weight 142.11g/mol
  • Synonyms 5-Methoxy-2, 4-pyrimidinediol
  • Chemical Name 2, 4-Dihydroxy-5-methoxypyrimidine
  • Category Impurity Standards

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Losartan Azide

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS No. 727718-93-6
  • Molecular Formula C22H22ClN9
  • Molecular Weight 447.93g/mol
  • Synonyms 5-[4'-[[5-(Azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl]methyl][1, 1'-biphenyl]-2-yl]-2H-tetrazole
  • Chemical Name 5-​[4'-​[[5-​(azidomethyl)​-​2-​butyl-​4-​chloro-​1H-​imidazol-​1-​yl]​methyl]​[1, ​1'-​biphenyl]​-​2-​yl]​-2H-​Tetrazole
  • Category Impurity Standards
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2’-Epi-Lamivudine

  • Country of Origin India
  • Molecular Formula C8H11N3O3S
  • Molecular Weight 229.26g/mol
  • Category Impurity Standards
  • Synonyms Lamivudine EP Impurity B,
  • Chemical Name 4-Amino-1-[(2S, 5S)-2-(hydroxymethyl)-1, 3-oxathiolan-5-yl]-2(1H)-pyrimidinone

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Methylprednisolone EP Impurity D

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C22H28O4
  • Molecular Weight 356.46g/mol
  • Synonyms 11β, 20-Dihydroxy-6α-methylpregna-1, 4, 17(20)-triene-3, 21-dione
  • Chemical Name (6α, 11β)-11, 20-Dihydroxy-6-methyl-3-oxopregna-1, 4, 17(20)-trien-21-al
  • Category Impurity Standards

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Famotidine Sulfoxide Impurity

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS No. 90237-03-9
  • Molecular Formula C8H15N7O3S3
  • Molecular Weight 353.44g/mol
  • Synonyms (Z)-3-(((2-((diaminomethylene)amino)thiazol-4-yl)methyl)sulfinyl)-N'-sulfamoylpropanimidamide
  • Chemical Name 3-[[2-(Diaminomethyleneamino)thiazol-4-yl]methylsulfinyl]-N′-sulfamoylpropanimidamide
  • Category Impurity Standards

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Prucalopride Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • Molecular Formula C14H18ClN3O2
  • Molecular Weight 295.8g/mol
  • Synonyms N-Desmethoxypropyl Prucalopride
  • Chemical Name 4-amino-5-chloro2, 3-dihydro-N(piperidin4-yl) benzofuran -7carboxamide
  • Category Impurity Standards

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Famotidine EP Impurity G

  • Country of Origin India
CAS. No.76823-97-7 Molecular FormulaC9H13N7S2 Molecular Weight283.38 g/mol Synonyms3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]thio]-N-cyanopropanimidamide Chemical NameN-cyano-3-[[[2-[(diaminomethylene) amino]thiazol-4-yl]methyl]sulphanyl]propanimidamide,
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Ibuprofen Impurity-E

  • Country of Origin India
  • Brand Name Simson Pharma
CAS. No.38861-78-8 Molecular FormulaC12H16O Molecular Weight176.25 g/ mol Synonyms1-(4-isobutylphenyl)ethanone Chemical Name1-[4-(2-ethylpropyl)phenyl]ethanone
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Atorvastatin USP Related Compound B

  • Brand Name A120013
  • Country of Origin India
  • Molecular Weight 1155.34 g/mol
Cat. No.A120013 CAS. No.887196-25-0 Molecular FormulaC66H68CaF2N4O10 Synonyms(3S, 5R)-Atorvastatin Calcium Salt Chemical Name(S, R)-2-(4-Fluorophenyl)-, -dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt
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Cetirizine Impurity B

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 344.84 g/mol
Cat. No.C100002 CAS. No.113740-61-7 Molecular FormulaC19H21ClN2O2 Chemical Name(RS)-2-[4-[(4-chlorophenyl)phenylmethyl] piperazin-1-yl]acetic acid
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Paracetamol Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
Cat. No.P030001 CAS. No.614-80-2 Molecular FormulaC8H9NO2 Molecular Weight151.16 g / mol Synonyms2-(N-Acetylamino)phenol; 2-Acetaminophenol; 2-Hydroxyacetanilide; o-(Acetylamino)phenol;USP Acetaminophen Related Compound C; Paracetamol EP Impurity A Chemical NameN-(2-hydroxyphenyl)acetamide
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Paracetamol Impurity-D(EP/BP)

  • Brand Name Simson Pharma
  • Country of Origin India
  • CAS No. 103-84-4
Cat. No. P030004 Molecular FormulaC8H9NO Molecular Weight135.16 g/mol Chemical NameN-phenylacetamide
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Fluoxetine EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
Cat. No.F150002 CAS. No.42142-52-9 Molecular FormulaC10H15NO Molecular Weight165.23 g/mol SynonymsN-Methyl-3-hydroxy-3-phenylpropylamine Chemical Name3-(Methylamino)-1-phenyl-1-propanol
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(14R)-14-Hydroxy Clarithromycin

  • Country of Origin India
  • Brand Name Simson Chemie
  • CAS No. 116836-41-0
  • Molecular Formula C38H69NO14
  • Molecular Weight 763.95 g/mol
  • Synonyms (14R)-14-Hydroxy-6-O-methylerythromycin
  • Chemical Name (3R, 4S, 5S, 6R, 7R, 9R, 11R, 12R, 13S, 14R)-6-(((2S, 3R, 4S, 6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-12, 13-dihydroxy-4-(((2R, 4R, 5S, 6S)-5-hydroxy-4-methoxy-4, 6-dimethyltetrahydro-2H-
  • Category Impurity Standards
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Fosfomycin Trometamol EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 84954-80-3
  • Molecular Formula C3H9O5P
  • Molecular Weight 156.07 g/mol
  • Synonyms , 2-Dihydroxypropyl)phosphonic Acid
  • Chemical Name 1, 2-dihydroxypropyl)phosphonic acid
  • Category Impurity Standards
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Duloxetine EP Impurity B

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 171.26 g/mol
  • CAS. No. 116539-55-0
  • Molecular Formula C8H13NOS
  • Chemical Name 3-(Methylamino)-1-(thiophen-2-yl)propan-1-ol
  • Category Impurity Standards
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Duloxetine EP Impurity E

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No 1033803-59-6
  • Molecular Formula C18H19NOS
  • Molecular Weight 297.41 g/mol
  • Chemical Name 2-(3-(methylamino)-1-(thiophen-2-yl)propyl)naphthalen-1-ol
  • Category Impurity Standards, Research Chemicals
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9-Propenyladenine

  • Molecular Formula C8H9N5
  • Molecular Weight 175.19 g/mol
  • Category Impurity Standards
  • CAS. No. 4121-40-8
  • Synonyms Tenofovir Disoproxil USP Related Compound B
  • Chemical Name 9-(prop-1-en-1-yl)-9H-purin-6-amine
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(S)-Tenofovir Disoproxil Fumarate

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS No. 1432630-26-6
  • Molecular Formula C19H30N5O10P . C4H4O4
  • Molecular Weight 635.51 g/mol
  • Synonyms Tenofovir Disoproxil USP Related Compound A
  • Chemical Name (S)-(((((1-(6-amino-9H-purin-9-yl)propan-2-yl)oxy)methyl)phosphoryl)bis(oxy))bis(methylene) diisopropyl dicarbonate fumarate
  • Category Impurity Standards
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Famotidine EP Impurity B

  • Brand Name Simson Pharma
  • Country of Origin India
  • Molecular Weight 561.75 g/mol
  • CAS. No. 89268-62-2
  • Molecular Formula C16H23N11O2S5
  • Synonyms N, N'''-[(1, 1-Dioxido-2H-1, 2, 4, 6-thiatriazine-3, 5-diyl)bis(2, 1-ethanediylthiomethylene-4, 2-thiazolediyl)]bisguanidine;
  • Chemical Name 3, 5-bis[2-[[[2-[(diaminomethylene) amino]thiazol-4-yl]methyl]sulphanyl]ethyl]-4H-1, 2, 4, 6-thiatriazine 1, 1-dioxide
  • Category Impurity Standards, Research Chemicals
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4,6-Dichloro-5-nitro-2-(propylthio)pyrimidine

  • Molecular Formula C7H7Cl2N3O2S
  • Molecular Weight 268.12 g/mol
  • Category Impurity Standards
  • CAS. No. 145783-14-8
  • Chemical Name 4, 6-dichloro-5-nitro-2-(propylthio)pyrimidine
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Levofloxacin Related Compound A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 117707-40-1
  • Molecular Formula C17H18FN3O4
  • Molecular Weight 347.34 g/mol
  • Chemical Name (S)-9-fluoro-2, 3-dihydro-3-methyl-10-(piperazin-1-yl)-7-oxo-7H-pyrido[1, 2, 3-de]-1, 4-benzoxazine-6-carboxylic acid
Synonyms Desmethyl Levofloxacin;(3S)-9-Fluoro-2, 3-dihydro-3-methyl-7-oxo-10-(1-piperazinyl)-7H-pyrido[1, 2, 3-de]-1, 4-benzoxazine-6-carboxylic Acid
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Hydroxychloroquine Sulfate EP Impurity C (Desethylhydroxychloroquine)

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS No. 4298-15-1
  • Molecular Formula C16H22ClN3O
  • Molecular Weight 307.80 g/mol
  • Chemical Name 2-[[(4RS)-4-[(7-Chloroquinolin-4-yl)amino]pentyl] amino]ethan-1-ol
  • Category Impurity Standards
Synonyms: Cletoquine;()-Desethylhydroxychloroquine; Desethylhydroxychloroquine;2-[[(4RS)-4-[(7-Chloroquinolin-4-yl)amino]pentyl]amino]ethanol; Desethylhydroxy Chloroquine; Ethanol, 2-[[4-[(7-chloro-4-quinolyl)amino]pentyl]amino]-; 2-[4-[(7-Chloro-4-quinolinyl)amino]pentyl] amino ethanol; Desethyl Hydroxychloroquine; 2-(4-[(7-Chloroquinolin-4-yl)amino]pentylamino)ethan-1-ol (USP)
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Clozapine EP Impurity A

  • Country of Origin India
  • Brand Name Simson Pharma
  • CAS. No. 50892-62-1
  • Molecular Formula C13H9ClN2O
  • Molecular Weight 244.68 g/mol
  • Chemical Name 8-Chloro-5, 10-dihydro-11H-dibenzo[b, e][1, 4]-diazepin-11-one
  • Category Impurity Standards

Clozapine EP impurity A

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