Pharmaceutical Impurity Reference Standards - Fountainbridge

Pharmaceutical Impurity Reference Standards

Fountainbridge are experts in the custom synthesis of pharmaceutical impurity reference standards and metabolite reference standards. We have successfully synthesised a large number of impurities on scales of milligrams to hundreds of grams. We excel in challenging syntheses and all our materials come with a detailed certificate of analysis. Please search our products below or contact us to request a quote

Fountainbridge is a leading global supplier of custom synthesised pharmaceutical impurity reference standards. Please Contact Us for a custom synthesis quotation for these or any other products of interest.

1-Phenyl-3-(piperidin-1-yl) propan-1-one hydrochloride

1-Phenyl-3-(piperidin-1-yl) propan-1-one hydrochloride

3,5-dichloro-2,6-dimethylpyridin-4-amine

4-Epi Doxycycline

(4R,4aR,5S,5aR,6R,12aS)-4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide

6-Hydroxymethylpterin

2-Amino-6-(hydroxymethyl)-4(3H)-pteridinone

Abacavir Impurity 1

N6-Cyclopropyl-9H-purine-2,6-diamine

2-Amino-6-cyclopropylamino-9H-purine

Abacavir Related Compound A

Abacavir EP Impurity C

Descyclopropyl Abacavir

Acetylcysteine impurity D

N,S-Diacetyl-L-cysteine

Alvimopan D5 Metabolite

(αS,3R,4R)-4-(3-Hydroxyphenyl)-3,4-dimethyl-α-(phenylmethyl-d5)-1-piperidinepropanoic acid

Amiodarone Related Compound D

Amiodarone EP Impurity D

2-Butyl-3-(3,5-diiodo-4-hydroxybenzoyl)benzofuran

Amoxicillin alpha penicilloic acid

(4S)-2-[{[(2R)-2-amino-2-(4-hydroxyphenyl)acetyl]amino}(carboxy)methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid

Amoxicillin Dimer Impurity

Amoxicillin dimer (penicilloic form)

2-(4-Hydroxyphenyl)glycyl-2-[4-carboxy-5,5-dimethyl-2-thiazolidinyl]glycyl-N-[2-carboxy-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-6-yl]-2-(4-hydroxyphenyl)glycinamide

Anastrozole Impurity A

Didestriazole Anastrozole Dimer Impurity

α1-[[3-(1-Cyano-1-methylethyl)-5-methylphenyl]methyl]-α1,α3,α3,5-tetramethyl-1,3-benzenediacetonitrile

Anastrozole impurity E

(2-[3-(Cyanodimethylmethyl)-5-hydroxymethylphenyl]-2-methylpropionitrile)

Atorvastatin (3S,5R) Impurity

Atorvastatin USP Related Compound B

(3S,5R)-Atorvastatin calcium salt

Atorvastatin (3S,5S) Impurity

Atorvastatin Related Compound E

(3S,5S)-Atorvastatin calcium salt

Atorvastatin Methyl

(βR,δR)-2-(4-Fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4- [(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic Acid Methyl Ester

Azelastine Impurity B

1-Benzoyl-2-[(4RS)-1-methylhexahydro-1H-azepin-4-yl]diazane Dihydrochloride

Benzydamine Hydrochloride Impurity A

3-(dimethylamino)propyl 2-(benzylamino)benzoate hydrochloride

Benzydamine Hydrochloride Impurity B

3-(1,5-Dibenzyl-1H-indazol-3-yl)oxypropyldimethylamine hydrochloride

Benzydamine Hydrochloride Impurity C

1-benzyl-1H-indazol-3-ol hydrochloride

2215-63-6 (free compound)

Betahistine EP Impurity C Trihydrochloride

N-methyl-2-(pyridin-2-yl)-N-[2-(pyridine-2-yl)ethyl]ethanamine trihydrochloride

5452-87-9 (free compound)

Betamethasone 21-valerate

(11β,16β)-9-Fluoro-11,17-dihydroxy-16-methyl-21-[(1-oxopentyl)oxy]pregna-1,4-diene-3,20-dione

Budesonide EP Impurity L

11-Keto Budesonide

Bufexamac impurity B

Methyl 4-butoxyphenylacetate

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