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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Vitamin D3, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Vitamin D3 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 Vitamin D3-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.

Vitamin D3 Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1 alpha-Hydroxyvitamin D3-d3 Stable Isotopes CS-EO-02407 41294-56-8 (Unlabelled) Enquire
1a Hydroxyvitamin D3-d6 (26,26,26,27,27,27-d6) Stable Isotopes CS-DF-00114 1641940-94-4 Enquire
25,26-Dihydroxy Vitamin D3-d3 Stable Isotopes CS-T-97581 Not Available Enquire
25-Hydroxy Vitamin D3-d6 Stable Isotopes CS-O-03654 78782-98-6 In Stock
25-Hydroxy Vitamin D3-d6 3-Sulfate Sodium Salt (80%) Stable Isotopes CS-T-101243 Not Available Enquire
25-Hydroxyvitamin D3 3-Glucuronide-d6 Stable Isotopes CS-T-97396 170512-14-8 Enquire
25-Hydroxyvitamin D3 3-Hemisuccinate-13C4 (90%) Stable Isotopes CS-T-97400 Not Available Enquire
25-Hydroxyvitamin D3 3-Hemisuccinate-d6 Stable Isotopes CS-T-97399 Not Available Enquire
3-Dehydroxy-3-ene-25-ol Vitamin D3-d6 Stable Isotopes CS-T-97650 Not Available Enquire
3-epi-24R 25-Dihydroxy Vitamin D3-d6 Stable Isotopes CS-T-97580 Not Available Enquire
3-epi-25-Hydroxy Vitamin D3-d6 Stable Isotopes CS-T-97398 73809-05-9 Enquire
3-Epi-25-Hydroxyvitamin D3-[13C5] Stable Isotopes CS-I-00434 2482467-12-7 Enquire
3-Epi-25-Hydroxyvitamin D3-[13C5] (Solution) Stable Isotopes CS-I-00544 2482467-12-7 Enquire
5-Hydroxyvitamin D3 25-Glucuronide-d6 Stable Isotopes CS-T-97397 84344-78-5 Enquire
Vitamin D3 (6,19,19-d3) Solution in Ethanol Stable Isotopes CS-I-00615 80666-48-4 Enquire
Vitamin D3 Sulfate-D7 Sodium Salt Stable Isotopes CS-T-97092 Not Available Enquire
Vitamin D3 β-D-Glucuronide-d7 Stable Isotopes CS-T-97093 Not Available Enquire
Vitamin D3-[23,24,25,26,27-13C5] (Solution) Stable Isotopes CS-I-00613 Not Available Enquire
Vitamin D3-[25,26,27-13C3] (Solution) Stable Isotopes CS-I-00614 67-97-0(unlabelled) Enquire
Vitamin D3-[d6] Sulfate Sodium Salt (Solution) Stable Isotopes CS-I-00617 78392-27-5(unlabelled) Enquire
Vitamin D3-d6, 1 mg/ml Stable Isotopes CS-I-00618 118584-54-6 Enquire
[19-13C]-Vitamin D3 Stable Isotopes CS-EK-00527 67-97-0 unlabeled Enquire
[9,19-13C2]-Vitamin D3 Stable Isotopes CS-EK-01522 613670-15-8 Enquire
1,25-Dihydroxy Vitamin D3 ,D3 Stable Isotopes CS-R-00124 128726-16-0 Enquire
1,25-Dihydroxyvitamin D3-[d3] (Solution) Stable Isotopes CS-I-00542 128723-16-0 Enquire
1,25-Dihydroxyvitamin D3-d6 (Solution) Stable Isotopes CS-I-00608 Not Available Enquire
24,25-Dihydroxyvitamin D3-D6 Stable Isotopes CS-BX-00274 55721-11-4 (Unlabeled) Enquire
24R,25-Dihydroxyvitamin D3-[26,26,26,27,27,27-d6] (Solution) Stable Isotopes CS-I-00541 1440957-55-0 Enquire
25-Hydroxyprovitamin D3-d6 Stable Isotopes CS-T-97414 Not Available Enquire
25-Hydroxyvitamin D3 D6 Stable Isotopes CS-BX-00535 78782-98-6 Enquire
25-Hydroxyvitamin D3-[26,26,26,27,27,27-d6] Monohydrate (Sol... Stable Isotopes CS-I-00548 78782-98-6 Enquire
25-Hydroxyvitamin D3-[D3] Stable Isotopes CS-O-10246 140710-94-7 Enquire
25-Hydroxyvitamin D3-[d3] (Solution) Stable Isotopes CS-I-00549 140710-94-7 Enquire
25-Hydroxyvitamin D3-[d3] Sulfate Sodium Salt (Solution) Stable Isotopes CS-I-00610 Not Available Enquire
25-Hydroxyvitamin D3-[d6] Sulfate Sodium Salt (Solution) Stable Isotopes CS-I-00611 Not Available Enquire
3-epi-25-Hydroxyvitamin D3 (6,19,19-D3) Stable Isotopes CS-BX-00261 73809-05-9 (Unlabeled) Enquire
3-Epi-25-hydroxyvitamin D3-[d3] (Solution) Stable Isotopes CS-I-00545 73809-05-9 (Unlabeled) Enquire
Vitamin D3-[6,19,19]-D3 Stable Isotopes CS-T-61795 80666-48-4 Enquire
Vitamin D3-[d3] Sulfate Sodium Salt (Solution) Stable Isotopes CS-I-00616 Not Available Enquire
Vitamin D3-d7 (Major) Stable Isotopes CS-T-87707 1627523-19-6 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
25-OH-Vitamin D3 API CS-DL-00734 63283-36-3 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
23,25-Dihydroxy Vitamin D3 Metabolite CS-T-53270 77733-16-5 Enquire
24,25-Dihydroxy Vitamin D3 3-Hemisuccinate Metabolite CS-T-53283 76763-28-5 Enquire
25-Hydroxyvitamin D3 Metabolite CS-O-10245 19356-17-3 In Stock
3-Dehydroxy-3-ene-25-ol Vitamin D3 Metabolite CS-T-51821 106361-90-4 Enquire
3-epi-24R 25-Dihydroxy Vitamin D3 Metabolite CS-T-53275 272776-87-1 Enquire
4a,25-Dihydroxy Vitamin D3 Metabolite CS-T-53266 1374022-57-7 Enquire
4-Beta,25-Dihydroxy Vitamin D3 Metabolite CS-T-53267 573951-39-0 Enquire
Vitamin D3 Hemisuccinate Metabolite CS-T-88161 64889-68-5 Enquire
1a,26-Dihydroxy Vitamin D3 Metabolite CS-T-90147 300692-92-6 Enquire
24, 25-Dihydroxy Vitamin D3 Metabolite CS-P-00040 40013-87-4 Enquire
25-Hydroxyvitamin D3 (6,19,19-D) 97% 100 μg/mL in ethanol Metabolite CS-I-00404 19356-17-3 Enquire
Pre-Vitamin D3 Octanoate (>80%) Metabolite CS-T-94999 927822-17-1 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(1S)-1,23-dihydroxy-24,25,26,27-tetranorcalciol Impurity CS-O-46741 97903-37-2 Enquire
1,23,25-trihydroxy-24-oxo-vitamin D3 Impurity CS-O-46169 87147-48-6 Enquire
1,25-dihydroxy-24-oxo-vitamin D3 Impurity CS-O-46171 76338-50-6 Enquire
1a,25(OH),23-oxovitamin D3 Impurity CS-O-46168 82095-23-6 Enquire
1a,25(R),26(OH)-23-oxovitamin D3 Impurity CS-O-46166 Not Available Enquire
1a,25(S),26(OH)-vitamin D3 Impurity CS-O-46167 77372-59-9 Enquire
1-Hydroxy-7,8-epoxy-vitamin D3 Impurity CS-O-57987 2227309-93-3 Enquire
1-Keto-7,8-epoxy-vitamin D3 Impurity CS-O-57988 2227309-94-4 Enquire
1-Keto-vitamin D3 Impurity CS-O-57989 86307-40-6 Enquire
3-epi-vitamin D3 Impurity CS-ED-41799 57651-82-8 Enquire
5,6-trans-Vitamin D3 Impurity CS-O-58339 3965-99-9 Enquire
Previtamin D3 Impurity CS-T-60762 1173-13-3 Enquire
Pre-Vitamin D3 Decanoate Impurity CS-EO-02335 927822-18-2 Enquire
1a,24R,25-Trihydroxyvitamin D3 Impurity CS-T-55861 56142-94-0 Enquire
22-(4-Hydroxyphenyl)-23,24,25,26,27-pentanor Vitamin D3 Impurity CS-T-78866 168408-60-4 Enquire
24R,25-Dihydroxyvitamin D3 Impurity CS-O-10243 55721-11-4 Enquire
25-Hydroxyprovitamin D3 Impurity CS-O-16209 22145-68-2 Enquire
3-epi-25-Hydroxy Vitamin D3 Impurity CS-T-56541 73809-05-9 Enquire
Isovitamin D3 Impurity CS-T-30117 42607-12-5 Enquire
Vitamin D3 Decanoate Impurity CS-T-62752 158180-04-2 Enquire
Vitamin D3 Octanoate Impurity CS-T-46513 927822-16-0 Enquire
Vitamin D3 O-t-Butyldimethylsilyl Ether Impurity CS-T-88115 87649-56-7 Enquire
Vitamin D3 Sulfate Sodium Salt Impurity CS-T-62750 78392-27-5 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1β-Hydroxy vitamin D3 Intermediate CS-T-56538 63181-13-5 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
25-Hydroxyvitamin D3 3-Glucuronide Glucuronide CS-T-56543 170512-14-8 Enquire
5-Hydroxyvitamin D3 25-Glucuronide Glucuronide CS-T-56542 84344-78-5 Enquire
Vitamin D3 N-acetylglucosaminide Glucuronide CS-T-87975 175409-16-2 Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Vitamin D3 Isomer Mix Secondary Standards CS-SS-25461-100MG Not Available Enquire


Natural Products

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(3R,6R)-6-((1R,3aS,7aR,E)-4-((Z)-2-((S)-5-hydroxy-2-methylen... Natural Products CS-O-37728 40016-87-4 Enquire