Reactive Black 5
活性黑5
Also known as: C.I. 20505, Reactive Black 5 (C.I. 20505), Remazol Black B, Black KN-B, Black B, Black KN-B, Tetrasodium (3Z)-5-amino-4-oxo-6-[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl-3-[[4-(2-sulfonatooxyethylsulfonyl)phenyl]hydrazinylidene]naphthalene-2,7-disulfonate
Reactive Black 5 (CAS 12225-25-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C22H16N2Na2O11S3 and a molecular weight of 626.54400 g/mol. It is also known as C.I. 20505, Reactive Black 5 (C.I. 20505) and Remazol Black B. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 12225-25-1
- Jingsj CID
- J-1110039-5
- Molecular Formula
- C22H16N2Na2O11S3
- Chinese Name
- 活性黑5
- Molecular Weight
- 626.54400 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quoteFrequently Asked Questions
What is the CAS number of Reactive Black 5?
The CAS number of Reactive Black 5 is 12225-25-1.
What are the molecular formula and molecular weight of Reactive Black 5?
Reactive Black 5 has molecular formula C22H16N2Na2O11S3 and molecular weight 626.54400 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Reactive Black 5 (CAS 12225-25-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1110039-5 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.