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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Thiamine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Thiamine 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 Thiamine-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.

Thiamine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
13C4 Thiamine Stable Isotopes CS-O-44947 2494124-99-9 Enquire
3-(N-Maleimido)propionate Thiamine-d4 Stable Isotopes CS-T-100094 Not Available Enquire
Thiamine Benzoate-d5 Hydrochloride Stable Isotopes CS-T-99077 Not Available Enquire
Thiamine hydrochloride phosphate-d3 Stable Isotopes CS-T-99792 Not Available Enquire
Thiamine monochloride-C13 hydrochloride Stable Isotopes CS-O-57404 67-03-8(Unlabelled) Enquire
Thiamine-13C3 Hydrochloride Stable Isotopes CS-T-94070 67-03-8 (unlabelled) Enquire
Thiamine-d4 HCl Stable Isotopes CS-P-08543 67-03-8 (Unlabelled) Enquire
Thiothiamine-13C3 Stable Isotopes CS-T-98700 Not Available Enquire
Thiamine d3 Hydrochloride Stable Isotopes CS-O-16964 Not Available Enquire
Thiamine-[13C4].Hydrochloride Stable Isotopes CS-I-00110 1257525-77-1 Enquire
Thiamine-d3 Pyrophosphate Chloride (d3-Major) Stable Isotopes CS-T-93735 154-87-0 (Unlabeled) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Benfotiamine API CS-O-06198 22457-89-2 In Stock
Oxythiamine Hydrochloride API CS-EO-03902 614-05-1 Enquire
Thiamine Disulfide Hydrate API CS-T-61990 67-16-3 In Stock
Thiamine hydrobromide API CS-O-44397 4234-86-0 Enquire
Thiamine Hydrochloride API CS-O-30783 67-03-8 In Stock
Toxopyrimidine API CS-M-56031 73-67-6 In Stock
Vitamin B1 API CS-O-02560 70-16-6 In Stock
ALLITHIAMINE API CS-DV-03462 554-44-9 Enquire
Oxythiamine API CS-ED-01932 136-16-3 Enquire
Pyrithiamine API CS-T-41212 534-64-5 Enquire
Thiochrome API CS-ED-01047 92-35-3 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Thiamine Sulfate Metabolite CS-T-61989 2380-61-2 In Stock


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2'-Nor Thiamine Impurity CS-ZH-39995 7770-93-6(Freebase) Enquire
2-Nor Thiamine Impurity CS-P-00220 7770-93-6 Enquire
2-Nor Thiamine Hydrochloride Salt Impurity CS-T-62882 49614-72-4 In Stock
Cocarboxylase Tetrahydrate Impurity CS-P-00907 68684-55-9 In Stock
Oxo Thiamine Impurity CS-T-38369 490-82-4 In Stock
Thiamine carboxamide Impurity Impurity CS-O-57770 7389-14-2 Enquire
Thiamine Disulfide Impurity CS-EO-03900 1899166-52-9 Enquire
Thiamine EP Impurity B (Bromide) Impurity CS-EO-03901 7771-57-5 (Freebase) Enquire
Thiamine EP Impurity B Hydrobromide Impurity CS-O-44131 Not Available Enquire
Thiamine EP Impurity B Hydrobromide Impurity CS-EO-03899 7770-93-6 (Freebase) Enquire
Thiamine EP Impurity C Impurity CS-EO-00058 20166-17-0 In Stock
Thiamine EP Impurity E Impurity CS-O-31156 299-35-4 In Stock
Thiamine Impurity 25 Impurity CS-T-95969 2169341-54-0 Enquire
Thiamine Impurity 25 DiHCl salt Impurity CS-P-09210 2169341-54-0 (Freebase) Enquire
Thiamine Impurity 5 Impurity CS-EO-01830 Not Available Enquire
Thiamine Impurity 6 Dihydrochloride Impurity CS-T-01878 874-43-1 In Stock
Thiamine Monophosphate Chloride Dihydrate Impurity CS-ZG-68287 273724-21-3 Enquire
Thiamine phosphoric acid ester phosphate salt Impurity CS-O-46978 635-97-2 Enquire
Thiamine Pyrophosphate Chloride Impurity CS-T-44112 154-87-0 In Stock
Thiamine Triphosphate Impurity CS-T-87207 3475-65-8 In Stock
(3R)-3-({[(4-amino-2-methylpyrimidin-5-yl)methyl]carbamothio... Impurity CS-O-35622 Not Available Enquire
5-(chloromethyl)-2-methylpyrimidin-4-amine Impurity CS-O-37763 189745-28-6 Enquire
5-(methoxymethyl)-2-methylpyrimidin-4-amine Impurity CS-O-39037 769-82-4 Enquire
Ethyl Thiamine Impurity CS-T-23210 3505-34-8 Enquire
Thiamine Acetate Hydrochloride Impurity CS-T-44114 1037-29-2 Enquire
Thiamine Benzoate Hydrochloride Impurity CS-T-86420 1052-32-0 Enquire
Thiamine EP Impurity B Impurity CS-EO-00057 7771-57-5 Enquire
Thiamine EP Impurity F Impurity CS-EO-00496 10593-44-9 Enquire
Thiamine Impurity 1 Impurity CS-EO-00497 7403-34-1 Enquire
Thiamine Impurity 3 Impurity CS-EO-01828 Not Available Enquire
Thiamine Impurity 4 Impurity CS-EO-01829 Not Available Enquire
Thiamine Impurity G Impurity CS-P-00225 Not Available Enquire
Thiamine Thiocarbamate Impurity CS-T-44116 89285-03-0 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Methyl-5-thiazoleethanol Intermediate CS-T-35171 137-00-8 Enquire
Oxythiamine Chloride Intermediate CS-O-15558 582-36-5 In Stock
Thiamine Nitrate Intermediate CS-T-86364 532-43-4 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Formylaminopyrimidine Fine Chemicals CS-T-02668 1886-34-6 In Stock
Thiamine monohydrate Fine Chemicals CS-O-30781 Not Available In Stock
Thiamine mononitrate Fine Chemicals CS-O-30785 532-43-4 In Stock
4-Amino-5-aminomethyl-2-methylpyrimidine Fine Chemicals CS-M-55521 95-02-3 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Thiamine Impurity 1 Nitrosamine CS-O-54757 ---- Enquire
N-Nitroso Thiamine Impurity F Nitrosamine CS-O-58385 ---- Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethylthiamine HCl Secondary Standards CS-SS-25072-100MG Not Available Enquire
Thiamine Disulfide Secondary Standards CS-SS-25116-1GM 67-16-3 Enquire
Thiamine hydrochloride Secondary Standards CS-SS-24093-1GM 67-03-8 Enquire
Thiamine Impurity A Secondary Standards CS-SS-24922-20MG Not Available Enquire
Thiamine Impurity B Secondary Standards CS-SS-24923-20MG 49614-72-4 Enquire
Thiamine Impurity C Secondary Standards CS-SS-24924-20MG Not Available Enquire
Thiamine Impurity D Secondary Standards CS-SS-25071-100MG 490-82-4 Enquire
Thiamine Impurity E Secondary Standards CS-SS-24708-20MG 299-35-4 Enquire
Thiamine Impurity G Secondary Standards CS-SS-25073-100MG 1037-29-2 Enquire
Thiamine Impurity I Secondary Standards CS-SS-25074-50MG 13100-57-7 Enquire
Thiamine Nitrate Secondary Standards CS-SS-24342-1GM 532-43-4 Enquire
Thiamine pyrophosphate Secondary Standards CS-SS-24370-500MG 154-87-0 Enquire
Thiamine Thiocarbamate Secondary Standards CS-SS-25107-100MG 89285-03-0 Enquire


Pharmaceutical Stds.

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethyl Thiamine Bromide Hydrobromide Pharmaceutical Stds. CS-TB-47810 6309-04-2 Enquire


Biochemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Thiamine Hydrochloride for tissue culture, 98.5% Biochemicals CS-SR-00442 67-03-8 Enquire
Thiamine Hydrochloride pure, 98.5% Biochemicals CS-SR-00443 67-03-8 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-(((4-amino-2-methylpyrimidin-5-yl)methyl)thio)-5-hydroxype... Building Blocks CS-O-44998 2410791-57-8 Enquire