Impurity Standards

IP, USP and EP Compliant

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Impurity Standards

(1S,2S)-Tramadol EP Impurity D HCl

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CAS No.148218-19-3

Mol. F.C15H23NO2. HCl

Mol. W.249.36 36.46

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(1R,2R)-Tramadol EP Impurity D HCl

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CAS No.148262-77-5

Mol. F.C15H23NO2. HCl

Mol. W.249.36 36.46

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Impurity Standards

(S)-Timolol EP Impurity C Maleate

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CAS No.1391068-18-0 (freebase)

Mol. F.C19H31N7O4S2. C4H4O4

Mol. W.485.63 116.07

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3,3'-L-Diiodothyronine (Levothyroxine Impurity J)

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CAS No.4604-41-5

Mol. F.C15H13I2NO4

Mol. W.525.08

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19-Epi FK-506 (Tacrolimus Impurity)

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CAS No.144490-63-1

Mol. F.C44H69NO12

Mol. W.804.04

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Impurity Standards

(R)-Sitagliptin Defluoro Impurity 3

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CAS No.851307-12-5

Mol. F.C15H19F2NO4

Mol. W.315.32

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Impurity Standards

(R)-Sitagliptin Defluoro Impurity 4

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CAS No.486459-98-7

Mol. F.C15H19F2NO4

Mol. W.315.32

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(S)-Sitagliptin N-Boc-Acid Impurity

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CAS No.922178-94-7

Mol. F.C15H18F3NO4

Mol. W.333.31

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Impurity Standards

(R)-Sitagliptin N-Boc-Methyl-Ester Impurity

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CAS No.881995-73-9

Mol. F.C16H20F3NO4

Mol. W.347.34

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Impurity Standards

(R)-Sitagliptin Methyl-Ester Impurity

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CAS No.881995-69-3

Mol. F.C11H12F3NO2

Mol. W.247.22

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