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Impurities & Reference Standards

Pharmacopeial Impurities (EP / USP / BP)

578 pharmacopeial impurities (ep / usp / bp) with CAS numbers, structures and specifications — batch COA and GHS SDS supplied.

4,399products

427in stock

COA + SDSwith every lot

Reference Standard

Candesartan Cilexetil EP Impurity G chemical structure

Candesartan Cilexetil EP Impurity G

CAS: 139481-59-7
Formula: C₂₄H₂₀N₆O₃
MW: 440.5 g/mol

In stock

Reference Standard

Candesartan Cilexetil EP Impurity H chemical structure

Candesartan Cilexetil EP Impurity H

CAS: 170791-09-0
Formula: C₅₂H₄₈N₆O₆
MW: 853 g/mol

In stock

Reference Standard

Candesartan Cilexetil EP Impurity I chemical structure

Candesartan Cilexetil EP Impurity I

CAS: 139481-69-9
Formula: C₂₅H₂₂N₆O₃
MW: 454.5 g/mol

In stock

Reference Standard

Capecitabine EP Impurity A chemical structure

Capecitabine EP Impurity A

CAS: 66335-38-4
Formula: C₉H₁₂FN₃O₄
MW: 245.21 g/mol

In stock

Reference Standard

Capecitabine EP Impurity A (Hydrobromide)

Capecitabine EP Impurity A (Hydrobromide)

CAS: 1373281-85-6
Formula: C₉H₁₂FN₃O₄.BrH
MW: 326.12 g/mol

VQ-006283

Reference Standard

Capecitabine EP Impurity A (Hydrochloride)

Capecitabine EP Impurity A (Hydrochloride)

CAS: 1373281-84-5
Formula: C₉H₁₂FN₃O₄.ClH
MW: 281.67 g/mol

VQ-006284

Reference Standard

Capecitabine EP Impurity A (Hydroiodide)

Capecitabine EP Impurity A (Hydroiodide)

CAS: 1373281-86-7
Formula: C₉H₁₂FN₃O₄.HI
MW: 373.12 g/mol

VQ-006285

Reference Standard

Capecitabine EP Impurity C chemical structure

Capecitabine EP Impurity C

CAS: 161599-46-8
Formula: C₁₃H₁₆FN₃O₆
MW: 329.28 g/mol

In stock

Reference Standard

Capecitabine EP Impurity C (Hydrochloride)

Capecitabine EP Impurity C (Hydrochloride)

CAS: 880633-96-5
Formula: C₁₃H₁₆FN₃O₆.ClH
MW: 365.75 g/mol

VQ-006287

Reference Standard

Capecitabine EP Impurity D chemical structure

Capecitabine EP Impurity D

CAS: 910129-15-6
Formula: C₁₅H₂₂FN₃O₆
MW: 359.35 g/mol

In stock

Reference Standard

Capecitabine EP Impurity E chemical structure

Capecitabine EP Impurity E

CAS: 162204-30-0
Formula: C₁₅H₂₂FN₃O₆
MW: 359.35 g/mol

In stock

Reference Standard

Capecitabine EP Impurity F chemical structure

Capecitabine EP Impurity F

CAS: 921769-65-5
Formula: C₁₆H₂₀FN₃O₇
MW: 385.34 g/mol

In stock

Reference Standard

Capecitabine EP Impurity G chemical structure

Capecitabine EP Impurity G

CAS: 162204-20-8
Formula: C₁₉H₂₆FN₃O₈
MW: 443.4 g/mol

In stock

Reference Standard

Capecitabine USP Impurity H chemical structure

Capecitabine USP Impurity H

CAS: 1262133-66-3
Formula: C₂₀H₃₀FN₃O₉
MW: 475.5 g/mol

VQ-021977

Reference Standard

Captopril EP Impurity A chemical structure

Captopril EP Impurity A

CAS: 64806-05-9
Formula: C₁₈H₂₈N₂O₆S₂
MW: 432.6 g/mol

VQ-021057

Reference Standard

Captopril EP Impurity B chemical structure

Captopril EP Impurity B

CAS: 80629-35-2
Formula: C₉H₁₄BrNO₃
MW: 264.12 g/mol

VQ-021987

Reference Standard

Captopril EP Impurity C chemical structure

Captopril EP Impurity C

CAS: 26473-47-2
Formula: C₄H₈O₂S
MW: 120.17 g/mol

VQ-021984

Reference Standard

Captopril EP Impurity D chemical structure

Captopril EP Impurity D

CAS: 56970-78-6
Formula: C₄H₇BrO₂
MW: 167 g/mol

VQ-021986

Reference Standard

Captopril EP Impurity E chemical structure

Captopril EP Impurity E

CAS: 23500-15-4
Formula: C₉H₁₅NO₃
MW: 185.22 g/mol

VQ-021988

Reference Standard

Captopril EP Impurity F chemical structure

Captopril EP Impurity F

CAS: 63250-36-2
Formula: C₉H₁₅NO₃S
MW: 217.29 g/mol

VQ-021985

Reference Standard

Captopril EP Impurity G chemical structure

Captopril EP Impurity G

CAS: 33325-40-5
Formula: C₆H₁₀O₃S
MW: 162.21 g/mol

VQ-021983

Reference Standard

Captopril EP Impurity H chemical structure

Captopril EP Impurity H

CAS: 205521-07-9
Formula: C₁₅H₂₃NO₅S₂
MW: 361.5 g/mol

VQ-024760

Reference Standard

Captopril EP Impurity J chemical structure

Captopril EP Impurity J

CAS: 64838-55-7
Formula: C₁₁H₁₇NO₄S
MW: 259.32 g/mol

VQ-021991

Reference Standard

Captopril EP Impurity J (Hydrate) chemical structure

Captopril EP Impurity J (Hydrate)

CAS: 801293-45-8
Formula: C₁₁H₁₉NO₅S
MW: 277.34 g/mol

VQ-036136

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