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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Pretomanid Impurity 4

Pretomanid Impurity 4

CAS: 1263187-37-6
Formula: C₁₄H₁₂F₃N₃O₅
MW: 459.26 g/mol

VQ-005646

Reference Standard

Pretomanide Impurity (Stage-1)

Pretomanide Impurity (Stage-1)

Formula: C₁₆H₁₀F₆O₃
MW: 364.24 g/mol

VQ-005647

Reference Standard

Pretomanide Impurity (Stage-II)

Pretomanide Impurity (Stage-II)

Formula: C₁₆H₁₂F₆O₃
MW: 366.26 g/mol

VQ-005648

Reference Standard

Previtamin D3 chemical structure

CAS: 1173-13-3
Formula: C₂₇H₄₄O
MW: 384.6 g/mol

VQ-024948

Reference Standard

Pridinol Methanesulfonate chemical structure

Pridinol Methanesulfonate

CAS: 6856-31-1
Formula: C₂₁H₂₉NO₄S
MW: 391.5 g/mol

VQ-027621

Reference Standard

Pridopidine chemical structure

CAS: 346688-38-8
Formula: C₁₅H₂₃NO₂S
MW: 281.4 g/mol

VQ-041661

Reference Standard

Primaquine Diphosphate chemical structure

Primaquine Diphosphate

CAS: 63-45-6
Formula: C₁₅H₂₇N₃O₉P₂
MW: 455.34 g/mol

VQ-027626

Reference Standard

Primaquine Phosphate Secaquine Impurity chemical structure

Primaquine Phosphate Secaquine Impurity

CAS: 2732404-25-8
Formula: C₁₅H₂₁N₃O
MW: 259.35 g/mol

VQ-035073

Reference Standard

Primulasaponin I chemical structure

Primulasaponin I

CAS: 65312-86-9
Formula: C₅₄H₈₈O₂₃
MW: 1105.3 g/mol

VQ-039141

Reference Standard

Procaine Nitro IsopropylEster

Procaine Nitro IsopropylEster

CAS: 59265-73-5
Formula: C₁₀H₁₀ClNO₄
MW: 243.64 g/mol

VQ-044877

Reference Standard

Procaine penicillin chemical structure

Procaine penicillin

CAS: 6130-64-9
Formula: C₂₉H₄₀N₄O₇S
MW: 588.7 g/mol

VQ-033333

Reference Standard

Procaine Related Compound Hydrochloride chemical structure

Procaine Related Compound Hydrochloride

CAS: 51444-52-1
Formula: C₂₈H₄₁ClN₂O₄
MW: 505.1 g/mol

VQ-041674

Reference Standard

Prochlorperazine Edisylate chemical structure

Prochlorperazine Edisylate

CAS: 1257-78-9
Formula: C₂₂H₃₀ClN₃O₆S₃
MW: 564.1 g/mol

VQ-027636

Reference Standard

Prochlorperazine Sulfone

Prochlorperazine Sulfone

CAS: 103509-14-4
Formula: C₂₀H₂₄ClN₃O₂S
MW: 405.94 g/mol

VQ-041679

Reference Standard

Procyanidin B2 chemical structure

CAS: 29106-49-8
Formula: C₃₀H₂₆O₁₂
MW: 578.5 g/mol

VQ-041682

Reference Standard

Procyanidin B3 chemical structure

CAS: 23567-23-9
Formula: C₃₀H₂₆O₁₂
MW: 578.5 g/mol

VQ-041684

Reference Standard

Progesterone 6-Oxo Impurity chemical structure

Progesterone 6-Oxo Impurity

CAS: 2243-08-5
Formula: C₂₁H₂₈O₃
MW: 328.4 g/mol

VQ-027637

Reference Standard

Progesterone Acetal Impurity chemical structure

Progesterone Acetal Impurity

CAS: 1051-35-0
Formula: C₂₃H₃₄O₃
MW: 358.5 g/mol

VQ-048119

Reference Standard

Progesterone Bisnoraldehyde Impurity chemical structure

Progesterone Bisnoraldehyde Impurity

CAS: 81201-82-3
Formula: C₂₂H₃₀O₂
MW: 326.5 g/mol

VQ-027638

Reference Standard

Progesterone Di-isopropylidene Impurity chemical structure

Progesterone Di-isopropylidene Impurity

CAS: 984-40-7
Formula: C₂₅H₃₈O₄
MW: 402.6 g/mol

VQ-041694

Reference Standard

Progesterone Impurity 3 chemical structure

Progesterone Impurity 3

CAS: 14510-23-7
Formula: C₂₁H₃₀O₃
MW: 330.5 g/mol

VQ-041687

Reference Standard

Progesterone Impurity-3 chemical structure

Progesterone Impurity-3

CAS: 5327-60-6
Formula: C₂₂H₃₂O₃
MW: 344.5 g/mol

VQ-044697

Reference Standard

Propamidine Isethionate chemical structure

Propamidine Isethionate

CAS: 140-63-6
Formula: C₂₁H₃₂N₄O₁₀S₂
MW: 564.6 g/mol

VQ-033357

Reference Standard

Propan-2-imine chemical structure

CAS: 38697-07-3
Formula: C₃H₇N
MW: 57.09 g/mol

VQ-048487

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