Impurity Reference Standards

API Impurities

Process impurities, isomers, degradants and related compounds for thousands of APIs, characterised for method development, validation and QC release.

9,055 products1,019 in stockCOA + SDS with every lot

9,055 products · page 263 of 378

Grid List

L-2-Aminobutyric Acid Methyl Ester Hydrochloride

CAS: 56545-22-3
Formula: C₅H₁₂ClNO₂
MW: 153.61 g/mol

ZX-026067

L-Alanyl-l-alanine

CAS: 1948-31-8
Formula: C₆H₁₂N₂O₃
MW: 160.17 g/mol

ZX-031118

L-alpha-Aspartyl-L-ornithine

CAS: 14169-16-5
Formula: C₉H₁₇N₃O₅
MW: 247.25 g/mol

ZX-030972

L-Alpha-Glycerophosphorylethanolamine

CAS: 33049-08-0
Formula: C₅H₁₄NO₆P
MW: 215.14 g/mol

ZX-025984

L-Arginine L-aspartate

CAS: 7675-83-4
Formula: C₁₀H₂₁N₅O₆
MW: 307.3 g/mol

ZX-025305

L-Asparagine anhydrous

CAS: 70-47-3
Formula: C₄H₈N₂O₃
MW: 132.12 g/mol

ZX-026040

L-Carnitine Fumarate

CAS: 90471-79-7
Formula: C₁₁H₁₈NO₇-
MW: 276.26 g/mol

ZX-034162

L-Cephalexin

CAS: 34632-04-7
Formula: C₁₆H₁₇N₃O₄S
MW: 347.4 g/mol

ZX-023884

L-Cycloserine

CAS: 339-72-0
Formula: C₃H₆N₂O₂
MW: 102.09 g/mol

ZX-024083

L-Cysteinesulfinic acid

CAS: 1115-65-7
Formula: C₃H₇NO₄S
MW: 153.16 g/mol

ZX-028776

L-DEA Impurity (N-1)

CAS: 746647-32-5
Formula: C₂₀H₂₆N₂O₂
MW: 326.4 g/mol

ZX-004840

L-Dehydro Ascorbic Acid

CAS: 490-83-5
Formula: C₆H₆O₆
MW: 174.11 g/mol

ZX-025311

L-DOPA Isopropyl Ester

CAS: 110301-07-0
Formula: C₁₂H₁₇NO₄
MW: 239.27 g/mol

ZX-030251

L-Glucono-1,5-lactone

CAS: 52153-09-0
Formula: C₆H₁₀O₆
MW: 178.14 g/mol

ZX-024957

L-Glufosinate

CAS: 35597-44-5
Formula: C₅H₁₂NO₄P
MW: 181.13 g/mol

ZX-041984

L-Hyoscyamine

CAS: 101-31-5
Formula: C₁₇H₂₃NO₃
MW: 289.4 g/mol

ZX-029862

L-Ido Miglustat

CAS: 305379-00-4
Formula: C₁₀H₂₁NO₄
MW: 219.28 g/mol

ZX-030609

L-Isoleucine Methyl Ester Hydrochloride

CAS: 18598-74-8
Formula: C₇H₁₆ClNO₂
MW: 181.66 g/mol

ZX-033746

L-Leucine-β-naphthylamide

CAS: 732-85-4
Formula: C₁₆H₂₀N₂O
MW: 256.34 g/mol

ZX-043654

L-Lysine-K-DEA (n-2) Impurity

CAS: 405-39-0
Formula: C₂₂H₂₆N₂O₆
MW: 414.5 g/mol

ZX-004841

L-Menthyl 2,2-Dihydroxyacetate

CAS: 111969-64-3
Formula: C₁₂H₂₂O₄
MW: 230.3 g/mol

ZX-026151

L-Menthyl Acetate

CAS: 2623-23-6
Formula: C₁₂H₂₂O₂
MW: 198.3 g/mol

ZX-034176

L-Milnacipran Hydrochloride

CAS: 175131-61-0
Formula: C₁₅H₂₃ClN₂O
MW: 282.81 g/mol

ZX-036821

L-Norepinephrine Bitartrate Monohydrate

CAS: 108341-18-0
Formula: C₁₂H₁₉NO₁₀
MW: 337.28 g/mol

ZX-025866

Have a list of compounds to price?

Paste up to 200 CAS numbers into Bulk CAS lookup, or send one enquiry for everything in your quote list. We reply with price, lead time and documents.

Bulk CAS lookup Open quote list