Oseltamivir Phosphate-impurities | Pharmaffiliates

oseltamivir phosphate and its Impurities

A phosphate salt of Oseltamivir, which an antiviral medication sold under the brand name of Tamiflu. It is used to treat and prevent influenza A and influenza B. It is a competitive inhibitor of influenza´s neuraminidase enzyme. Reference standards of Oseltamivir Phosphate API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 17 results for oseltamivir phosphate Impurities
PA 15 12000

Oseltamivir Phosphate - API Standards

Oseltamivir Phosphate


  • Catalogue No.:PA 15 12000

  • CAS :

    204255-11-8

  • Molecular Formula : C16H31N2O8P

  • Molecular Weight : 410.40

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PA 15 12010

Oseltamivir Phosphate - Impurity A

(3R,4R,5S)-5-Acetamido-4-amino-3-(1-ethylpropoxy)cyclohex-1-ene-1-carboxylic Acid


  • Catalogue No.:PA 15 12010

  • CAS :

    1364932-19-3

  • Molecular Formula : C14H24N2O4

  • Molecular Weight : 284.35

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PA 15 12030

Oseltamivir Phosphate - Impurity C

(3R,4R,5S)-4-acetamido-5-amino-3-(1-ethylpropoxy)cyclohex-1-ene-1-carboxylic Acid


  • Catalogue No.:PA 15 12030

  • CAS :

    187227-45-8

  • Molecular Formula : C14H24N2O4

  • Molecular Weight : 284.35

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PA 15 12060

Oseltamivir Phosphate - Impurity F

3-Des(1-ethylpropoxy)-3-(1-methylpropoxy) Oseltamivir


  • Catalogue No.:PA 15 12060

  • CAS :

    1052063-37-2

  • Molecular Formula : C15H26N2O4

  • Molecular Weight : 298.38

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PA 15 12070

Oseltamivir Phosphate - Impurity G

4-N-Desacetyl-5-N-acetyl Oseltamivir


  • Catalogue No.:PA 15 12070

  • CAS :

    956267-10-0

  • Molecular Formula : C16H28N2O4

  • Molecular Weight : 312.40

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PA 15 12080

Oseltamivir Phosphate - Impurity H

Tributylphosphine Oxide


  • Catalogue No.:PA 15 12080

  • CAS :

    814-29-9

  • Molecular Formula : C12H27OP

  • Molecular Weight : 218.32

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PA 15 12520

Oseltamivir Phosphate - Impurity E (Freebase)

Methyl (3R,4R,5S)-4-acetamido-5-amino-3-(1- ethylpropoxy)cyclohex-1-ene-1-carboxylate


  • Catalogue No.:PA 15 12520

  • CAS :

    208720-71-2

  • Molecular Formula : C15H26N2O4

  • Molecular Weight : 298.38

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PA 15 12600

Oseltamivir Phosphate - Impurity D

4-Acetylamino-3-hydroxybenzoic Acid Ethyl Ester


  • Catalogue No.:PA 15 12600

  • CAS :

    1346604-18-9

  • Molecular Formula : C11N13NO4

  • Molecular Weight : 223.23

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PA 15 12040

Oseltamivir Phosphate - Impurity D

Ethyl 4-acetamido-3-hydroxybenzoate


  • Catalogue No.:PA 15 12040

  • CAS :

    1346604-18-9

  • Molecular Formula : C11H13NO4

  • Molecular Weight : 223.23

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PA 15 12020

Oseltamivir Phosphate - Impurity B

Ethyl (1R,2R,3S,4R,5S)-4-acetamido-5-amino-2-azido-3-(1-ethylpropoxy)cyclohexanecarboxylate


  • Catalogue No.:PA 15 12020

  • CAS :

    2413185-84-7

  • Molecular Formula : C16H29N5O4

  • Molecular Weight : 355.43

PA 15 12570

(1R,5R,6R)-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester

(1R,5R,6R)-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester


  • Catalogue No.:PA 15 12570

  • CAS :

    1266663-89-1

  • Molecular Formula : C14H22O4

  • Molecular Weight : 254.32

PA 15 12625

Ethyl (3R,4S,5R)-4-acetamido-5-amino-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Phosphate

Ethyl (3R,4S,5R)-4-acetamido-5-amino-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Phosphate


  • Catalogue No.:PA 15 12625

  • CAS :

    NA

  • Molecular Formula : C16H31N2O8P

  • Molecular Weight : 410.4

PA 15 0121000

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester


  • Catalogue No.:PA 15 0121000

  • CAS :

    1052063-36-1

  • Molecular Formula : C14H24N2O4

  • Molecular Weight : 284.36

PA 15 0120011

Oseltamivir Phosphate - Impurity A (Hydrochloride Salt)

(3R,4R,5S)-5-Acetamido-4-amino-3-(1-ethylpropoxy)cyclohex-1-ene-1-carboxylic Acid Hydrochloride Salt


  • Catalogue No.:PA 15 0120011

  • CAS :

    NA

  • Molecular Formula : C14H25ClN2O4

  • Molecular Weight : 320.81

PA 15 0120031

Oseltamivir Phosphate - Impurity C (Hydrochloride Salt)

(3R,4R,5S)-4-Acetamido-5-amino-3-(1-ethylpropoxy)cyclohex-1-ene-1-carboxylic acid Hydrochloride


  • Catalogue No.:PA 15 0120031

  • CAS :

    1415963-60-8

  • Molecular Formula : C14H25ClN2O4

  • Molecular Weight : 320.81

PA 15 0121011

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester Phosphate

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester Phosphate


  • Catalogue No.:PA 15 0121011

  • CAS :

    NA

  • Molecular Formula : C14H27N2O8P

  • Molecular Weight : 382.35

PA 15 0121012

Ethyl 4-acetamido-5-amino-3-isopropoxycyclohex-1-ene-1-carboxylate Phosphate

Ethyl 4-acetamido-5-amino-3-isopropoxycyclohex-1-ene-1-carboxylate Phosphate


  • Catalogue No.:PA 15 0121012

  • CAS :

    NA

  • Molecular Formula : C14H27N2O8P

  • Molecular Weight : 382.35