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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Methionine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Methionine impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Methionine-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Methionine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(RS)-S-Adenosyl-L-methionine-d3 (S-methyl-d3) Tetra(p-toluen... Stable Isotopes CS-T-102983 Not Available Enquire
Ademethionine-d3 1,4-Butanedisulfonate (>85%) Stable Isotopes CS-T-103021 101020-79-5(Unlabelled) Enquire
Decarboxylated S-Adenosylmethionine-d3 Sulfuric Acid Stable Isotopes CS-T-94859 22365-13-5 (unlabled free base) Enquire
L-Methionine Sulfone-d3 Stable Isotopes CS-T-96900 Not Available Enquire
L-Methionine Sulfoxide,13C Stable Isotopes CS-T-102916 3226-65-1(Unlabelled) Enquire
L-Methionine-[13C5] (Solution) Stable Isotopes CS-I-00662 202326-57-6 Enquire
L-Methionine-S-methyl Sulfonium Chloride-d6 Hydrochloride Stable Isotopes CS-T-96901 Not Available Enquire
S-(5'-Adenosyl)-L-methionine-13C5 Sulfate Salt (Synthetic)(M... Stable Isotopes CS-T-96655 Not Available Enquire
S-(5'-Adenosyl)-L-methionine-d3 Disulfate Salt (Synthetic)(M... Stable Isotopes CS-T-96656 Not Available Enquire
DL-Methionine D7 Stable Isotopes CS-O-32909 59-51-8 (Unlabeled Enquire
DL-Methionine-d3 (S-methyl-d3) Stable Isotopes CS-C-00869 284665-20-9 Enquire
D-Methionine-d3 (S-methyl-d3) Stable Isotopes CS-C-00868 284665-18-5 Enquire
L-Methionine [R,S]-Sulfoximine-13C5 Stable Isotopes CS-T-62883 15985-39-4(Unlabeled) Enquire
L-Methionine-13C Stable Isotopes CS-BE-00034 63-68-3 (Unlabeled) Enquire
L-Methionine-13C5 Stable Isotopes CS-T-82558 202326-57-6 Enquire
L-Methionine-S-methyl Sulfonium Chloride-d6 Stable Isotopes CS-T-57601 362049-54-5 Enquire
Methionine sulfone- D4 Stable Isotopes CS-O-35513 820-10-0 (Unlabeled) Enquire
Methionine sulfoxide- D4 Stable Isotopes CS-O-35514 62697-73-8 (Unlabeled) Enquire
N-Fmoc-L-Methionine-34S Stable Isotopes CS-P-08203 71989-28-1 (Unlabeled) Enquire
S-adenosyl methionine D3 Stable Isotopes CS-O-40391 68684-40-2 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(±)-Methionine API CS-T-32131 59-51-8 In Stock
Methionine API CS-O-30653 63-68-3 In Stock
Methionine Calcium API CS-O-51218 93805-84-6 Enquire
Selenomethionine API CS-T-42218 1464-42-2 In Stock
D-Methionine API CS-T-57607 348-67-4 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
DL-Methioninehydroxyanalog calcium Metabolite CS-P-07240 4857-44-7 In Stock


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ac-DL-Met-OH Impurity CS-G-00018 1115-47-5 In Stock
L-Methionine Sulfoxide Impurity CS-T-57600 3226-65-1 In Stock
Methionine Impurity D Impurity CS-O-59331 1879009-96-7 Enquire
Methionine Impurity E Impurity CS-O-59333 ---- Enquire
S-Adenosyl-L-methionine Impurity CS-O-30770 29908-03-0 Enquire
α-hydroxy-methionine Impurity CS-O-14099 103063-66-7 Enquire
Decarboxylated S-Adenosylmethionine Impurity CS-P-08973 22365-13-5 Enquire
Decarboxylated S-Adenosylmethionine Sulfate Salt Impurity CS-T-73209 67380-81-8 Enquire
D-Methionine 1,1-Dimethylethyl Ester Hydrochloride Impurity CS-T-80090 1356447-69-2 Enquire
Hydroxymethionine Dimer impurity Impurity CS-O-41200 33770-86-4 Enquire
Hydroxymethionine Thio-Thio methyl impurity Impurity CS-O-41201 192509-56-1 Enquire
L-Methionine [R,S]-Sulfoximine Impurity CS-T-57603 15985-39-4 Enquire
L-Methionine [R]-Sulfoximine Impurity CS-T-57604 21752-31-8 Enquire
L-Methionine [S]-Sulfoximine Impurity CS-T-57605 21752-32-9 Enquire
L-Methionine Allyl Ester Tosylate Impurity CS-T-57597 142601-87-4 Enquire
L-Methionine Methyl Ester Hydrochloride Impurity CS-T-32140 2491-18-1 Enquire
L-Methionine Sulfone Impurity CS-T-81789 7314-32-1 Enquire
L-Methionine tert-Butyl Ester Hydrochloride Impurity CS-T-32141 91183-71-0 Enquire
L-Methionine-34S Impurity CS-T-57599 475-25-2 Enquire
L-Methionine-S-methyl Sulfonium Chloride Impurity CS-T-32137 1115-84-0 Enquire
N-Acetyl Methionine Methyl Ester Impurity CS-T-00933 7451-74-3 Enquire
N-Boc-D-methionine Impurity CS-T-07639 5241-66-7 Enquire
N-Boc-L-methionine Impurity CS-T-07640 2488-15-5 Enquire
Orlistat L-Methionine Impurity CS-T-83025 1356354-38-5 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Fmoc-L-methionine Intermediate CS-T-24553 71989-28-1 In Stock
Adenosylmethionine decarboxylase Intermediate CS-ED-41958 9036-20-8 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
DL-Methionine Sulfone Fine Chemicals CS-O-54646 820-10-0 Enquire
L-Selenomethionine Fine Chemicals CS-T-61267 3211-76-5 In Stock
Zinc Monomethionine Sulfate Fine Chemicals CS-O-16645 56329-42-1 In Stock


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Acetyl-Nitroso-DL-Methionine Nitrosamine CS-O-39971 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
L-Methionine Secondary Standards CS-SS-24260-1GM 63-68-3 Enquire
N-Acetyl-D,L-Methionine Secondary Standards CS-SS-25445-200MG 1115-47-5 Enquire
Racemethionine Secondary Standards CS-SS-25452-500MG 59-51-8 Enquire
Selenomethionine Secondary Standards CS-SS-25426-200MG 1464-42-2 Enquire
S-Selenomethionine Secondary Standards CS-SS-26046-200MG 3211-76-5 Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(RS)-S-Adenosyl-L-methionine-d3 (S-methyl-d3 ) Tetra(p-tolue... Stable Isotope Reagent CS-C-01657 Not Available Enquire
D-Methionine-d3-N-FMOC (S-methyl-d3) Stable Isotope Reagent CS-C-00183 112883-40-6 (Unlabeled) Enquire
L-Methionine-d3 (S-methyl-d3) Methyl-d3-sulfonium Chloride H... Stable Isotope Reagent CS-C-00646 63889-27-0(Unlabelled) Enquire
DL-Methionine-2-d1 Stable Isotope Reagent CS-C-00545 67866-74-4 Enquire
D-Methionine D4 Stable Isotope Reagent CS-C-00410 348-67-4 (Unlabeled) Enquire
D-Methionine-3,3,4,4-d4 Stable Isotope Reagent CS-C-01332 348-67-4 (Unlabelled) Enquire
L-Methionine D3 Stable Isotope Reagent CS-T-57598 13010-53-2 Enquire
L-Methionine-13C, D1 Stable Isotope Reagent CS-CH-00133 1217447-94-3 Enquire
L-Methionine-13C, D2 Stable Isotope Reagent CS-CH-00134 1240484-64-3 Enquire
L-Methionine-13C, N-Boc Stable Isotope Reagent CS-CH-00131 286437-20-5 Enquire
L-Methionine-13C5,15N Stable Isotope Reagent CS-BX-00255 202468-47-1 Enquire
L-Methionine-13CD3 Stable Isotope Reagent CS-BE-00072 63-68-3 (Unlabeled) Enquire
L-Methionine-15N Stable Isotope Reagent CS-CH-00135 82572-25-6 Enquire
L-Methionine-15N, N-Fmoc Stable Isotope Reagent CS-CH-00136 934183-50-3 Enquire
L-Methionine-3,3,4,4-d4 Stable Isotope Reagent CS-C-01102 67866-75-5 Enquire
L-Methionine-D1 Stable Isotope Reagent CS-CH-00138 74334-17-1 Enquire
L-Methionine-d3-N-FMOC (S-methyl-d3) Stable Isotope Reagent CS-C-01133 502692-58-2 Enquire
L-Selenomethionine-(methyl-13C) Stable Isotope Reagent CS-BX-00430 1217470-45-5 Enquire
N-Acetyl-D-methionine-3,3,4,4-d4 Stable Isotope Reagent CS-C-01437 1509-92-8(unlabelled) Enquire
N-Acetyl-L-methionine-D3 Stable Isotope Reagent CS-C-00345 65-82-7(Unlabeled) Enquire
N-Boc-L-Methionine (Methyl-13C) Stable Isotope Reagent CS-CH-00139 286460-62-6 Enquire


"NMR and Deuterated Solvents, Stable Isotopes"

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(±)-Methionine-d4 "NMR and Deuterated Solvents, Stable Isotopes" CS-T-82293 93709-61-6 In Stock


Biochemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
L-Methionine for cell culture, 99%, Endotoxin (BET) 0.05EU/m... Biochemicals CS-SR-00522 63-68-3 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
S-Adenosyl-L-methionine 1,4-butane sulfonate Building Blocks CS-T-47451 101020-79-5 Enquire
Fmoc-l-beta-homomethionine Building Blocks CS-T-77157 266359-48-2 Enquire
N-Cbz-L-methionine Building Blocks CS-T-10680 1152-62-1 Enquire