Molekula
Bilirubin
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Bilirubin is a yellow-orange bile pigment produced during the breakdown of red blood cells, primarily used as a biological marker in medical diagnostics and research for assessing liver function and jaundice. It is also employed in biochemical assays and as a reference standard for analytical studies. This chemical has a CAS number of 635-65-4, with the molecular formula C33H36N4O6 and a molecular weight of 584.66. It requires storage at 2 to 8°C and carries no signal word for hazard classification. Molekula supplies Bilirubin from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 g — $146.80 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Orange powder |
| Loss on Drying | <3% |
| Assay | >96.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 35227698 |
| CAS Number | 635-65-4 |
| IUPAC Name | 3-[2-[[3-(2-carboxyethyl)-5-[(Z)-(3-ethenyl-4-methyl-5-oxopyrrol-2-ylidene)methyl]-4-methyl-1H-pyrrol-2-yl]methyl]-5-[(Z)-(4-ethenyl-3-methyl-5-oxopyrrol-2-ylidene)methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid |
| EC Number | 211-239-7 |
| Molecular Formula | C33H36N4O6 |
| Molecular Weight | 584.66 |
| Exact Mass | 584.2635 |
| SMILES | CC1=C(NC(=C1CCC(=O)O)CC2=C(C(=C(N2)/C=C\3/C(=C(C(=O)N3)C)C=C)C)CCC(=O)O)/C=C\4/C(=C(C(=O)N4)C=C)C |
| InChIKey | BPYKTIZUTYGOLE-IFADSCNNSA-N |
| InChI | InChI=1S/C33H36N4O6/c1-7-20-19(6)32(42)37-27(20)14-25-18(5)23(10-12-31(40)41)29(35-25)15-28-22(9-11-30(38)39)17(4)24(34-28)13-26-16(3)21(8-2)33(43)36-26/h7-8,13-14,34-35H,1-2,9-12,15H2,3-6H3,(H,36,43)(H,37,42)(H,38,39)(H,40,41)/b26-13-,27-14- |
| PubChem CID | 5280352 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2933798500 |
| Tariff Code | 2933790090 |
Safety & GHS
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P403+233 Store in a well ventilated place. Keep container tightly closed
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Bilirubin IX-alpha
- Bilirubin test
- Bilirubinate, Calcium
- Calcium Salt Bilirubin
- Cholerythrin
- delta Bilirubin
- Disodium Salt Bilirubin
- Hematoidin
- Hemetoidin
- Salt Bilirubin, Calcium
Frequently asked questions
What is bilirubin used for in research or clinical applications?
Bilirubin is primarily used as a biological marker for liver function studies, jaundice research, and as a substrate for enzyme assays (e.g., UDP-glucuronosyltransferase). It is also studied for its antioxidant properties.
What is the chemical formula and molecular weight of bilirubin?
The chemical formula is **C₃₃H₃₆N₄O₆**, and the molecular weight is **584.66 g/mol**.
How should bilirubin be stored to maintain stability?
Store bilirubin at **2–8°C** in a desiccated, light-protected container to prevent degradation. Avoid freeze-thaw cycles.
What purity grades are available for bilirubin from Molekula?
Molekula supplies bilirubin in **analytical grade (≥98% purity)** and **biological research grade (≥95% purity)**. Custom grades may be available upon request.
Can Molekula supply bilirubin in bulk quantities for large-scale research or manufacturing?
Yes, we offer bilirubin in bulk (typically ≥1g, ≥5g, or ≥25g) for research, clinical diagnostics, or industrial applications. Contact us for pricing and lead times.
What documentation is provided with a bilirubin order?
Each order includes a **Certificate of Analysis (CoA)** with batch-specific purity, HPLC/UV data, and storage instructions. MSDS/SDS and a product specification sheet are also provided.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.