amoxicillin trihydrate and its Impurities
Amoxicillin Trihydrate is an antibiotic used to treat a number of bacterial infections.It was discovered in 1958 and came into medical use in 1972. Reference standards of Amoxicillin Trihydrate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


Amoxicillin Trihydrate - Impurity O (Freebase)
(2S,5R,6R)-6-[[((2R)-2-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-2-[(2R,4S)-4-carboxy-5,5-dimethyl-1,3-thiazolidin-2-yl]acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PA 01 55150
CAS :
NA
Molecular Formula : C24H31N5O8S2
Molecular Weight : 581.66


Amoxicillin Trihydrate - Impurity K (Trisodium Salt)
(4S)-2-(1-((R)-2-Amino-2-(4-hydroxyphenyl)acetamido)-2-(((1R)-2-((carboxy((4S)-4-carboxy-5,5-dimethylthiazolidin-2-yl)methyl)amino)-1-(4-hydroxyphenyl)-2-oxoethyl)amino)-2-oxoethyl)-5,5-dimethylthiazolidine-4-carboxylic Acid Trisodium Salt
Catalogue No.:PA 01 0550111
CAS :
NA
Molecular Formula : C32H37N6Na3O11S2
Molecular Weight : 814.77


Amoxicillin Trihydrate - Impurity S
(2S,5R,6R)-6-[[(2R)-2-Amino-2-[4-[[(2R)-2-amino-2-(4-hydroxyphenyl)acetyl]oxy]phenyl]acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PA 01 0550190
CAS :
NA
Molecular Formula : C24H26N4O7S
Molecular Weight : 514.55


Amoxicillin Trihydrate - Impurity T
(2S,5R,6R)-6-[[(2R)-2-(4-Hydroxyphenyl)-2-[3-(4-hydroxyphenyl)-7-methyl-2,5-dioxo2,3,4,5-tetrahydro-1H-1,4-diazepin-1-yl]acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1- azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PA 01 0550200
CAS :
NA
Molecular Formula : C28H28N4O8S
Molecular Weight : 580.61


(2S,5R,6R)-6-(((Z)-4-Ethoxy-4-oxobut-2-en-2-yl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
(2S,5R,6R)-6-(((Z)-4-Ethoxy-4-oxobut-2-en-2-yl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PAI 01 055005
CAS :
NA
Molecular Formula : C14H20N2O5S
Molecular Weight : 328.38


(2S,5R,6R)-6-(((Z)-4-Ethoxy-4-oxobut-2-en-2-yl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
(2S,5R,6R)-6-(((Z)-4-Ethoxy-4-oxobut-2-en-2-yl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PAI 01 055006
CAS :
2756584-81-1
Molecular Formula : C21H26N2O5S
Molecular Weight : 418.51


(2S,5R,6R)-2-((Benzyloxy)carbonyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptan-6-aminium sulfanolate-t
(2S,5R,6R)-2-((Benzyloxy)carbonyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptan-6-aminium sulfanolate-t
Catalogue No.:PAI 01 055007
CAS :
NA
Molecular Formula : C15H19TN2O4S2
Molecular Weight : 358.46


Benzyl (2S,5R,6R)-6-((2S,5R,6R)-6-((R)-2-(((benzyloxy)carbonyl)amino)-2-(4-(((benzyloxy)carbonyl)oxy)phenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
Benzyl (2S,5R,6R)-6-((2S,5R,6R)-6-((R)-2-(((benzyloxy)carbonyl)amino)-2-(4-(((benzyloxy)carbonyl)oxy)phenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
Catalogue No.:PAI 01 055008
CAS :
1789703-35-0
Molecular Formula : C47H47N5O11S2
Molecular Weight : 922.04


(2R,5S,6S)-6-((S)-2-(((Benzyloxy)carbonyl)amino)-2-(4-(((benzyloxy)carbonyl)oxy)phenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
(2R,5S,6S)-6-((S)-2-(((Benzyloxy)carbonyl)amino)-2-(4-(((benzyloxy)carbonyl)oxy)phenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PAI 01 055009
CAS :
NA
Molecular Formula : C32H31N3O9S
Molecular Weight : 633.67


(2S,5R,6R)-6-((R)-2-((tert-butoxycarbonyl)amino)-2-(4-hydroxyphenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
(2S,5R,6R)-6-((R)-2-((tert-butoxycarbonyl)amino)-2-(4-hydroxyphenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PAI 01 055010
CAS :
143488-07-7
Molecular Formula : C21H27N3O7S
Molecular Weight : 465.52


(2S,5R,6R)-6-((2S,5R,6R)-6-((R)-2-((tert-Butoxycarbonyl)amino)-2-(4-hydroxyphenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
(2S,5R,6R)-6-((2S,5R,6R)-6-((R)-2-((tert-Butoxycarbonyl)amino)-2-(4-hydroxyphenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid
Catalogue No.:PAI 01 055011
CAS :
NA
Molecular Formula : C29H37N5O9S2
Molecular Weight : 663.76