B12 Lyophilized 5mg
Research Compound
Vitamin B12 (methylcobalamin) lyophilized for research applications in cellular metabolism and energy studies. ≥99% purity. For laboratory research use only — not for human consumption.
For research use only. Not for human consumption.
Third-party lab verification
Every batch is tested by an independent laboratory using RP-HPLC to confirm identity, purity, and endotoxin levels. Sample results for B12 Lyophilized 5mg shown below — lot-specific COAs available on request.
Independent Analytical Laboratory
Certificate of Analysis
Document
COA-B12-2026-0610
Product
Methylcobalamin (Vitamin B12)
CAS No.
13422-55-4
Molecular Formula
C63H91CoN13O14P
Molecular Weight
1344.38 g/mol
Lot Number
B12-2026-0610
Appearance
Dark red lyophilized powder
Manufacture Date
2026-06-10
Retest Date
2028-06-10
Test Results
| Test | Specification | Result | Status |
|---|---|---|---|
| Identification | Conforms (MS) | Conforms | Pass |
| Purity (HPLC) | ≥ 98.0% | 99.55% | Pass |
| Water Content | ≤ 5.0% | 1.6% (Karl Fischer) | Pass |
| Endotoxin | < 10 EU/mg | <5 EU/mg (LAL) | Pass |
| Single Impurity | ≤ 1.0% | 0.46% | Pass |
Method
RP-HPLC, C18, 361 nm, phosphate buffer / MeOH
R. Halverson
QC Analyst
Sample document — request your lot's COA for verification.
RP-HPLC Chromatogram
Methylcobalamin (Vitamin B12)
Detector
UV 220 nm
Retention
3.12 min
Area %
99.55%
Plates (N)
8,319
| Peak | RT (min) | Area % | Assignment |
|---|---|---|---|
| 1 | 1.70 | 0.26 | Impurity A |
| 2 | 3.12 | 99.55 | Methylcobalamin (Vitamin B12) |
| 3 | 4.30 | 0.22 | Impurity B |
Sample chromatogram — lot-specific traces on request.
Illustrative sample — request your lot's COA via 907-252-1640