Direct Red 31
直接红31
Also known as: Direct Red 12B, Direct Pink 12B, Direct Pink, C.I. Direct Red 31, C.I. 29100, Benzo Rhoduline Red B, Chloramine Rose B, Pyrazol Pink 2B, Diphenyl Red RW, Nippon Fast Red 2B, Disodium 7,7'-iminobis(4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate), 2-Naphthalenesulfonic acid, 7,7'-iminobis[4-hydroxy-3-[(E)-2-phenyldiazenyl]-, sodium salt (1:2)
Direct Red 31 (CAS 5001-72-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C32H21N5Na2O8S2 and a molecular weight of 713.647 g/mol. It is also known as Direct Red 12B, Direct Pink 12B and Direct Pink. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5001-72-9
- Jingsj CID
- J-1353510-8
- Molecular Formula
- C32H21N5Na2O8S2
- Chinese Name
- 直接红31
- Molecular Weight
- 713.647 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 Direct Red 31?
The CAS number of Direct Red 31 is 5001-72-9.
What are the molecular formula and molecular weight of Direct Red 31?
Direct Red 31 has molecular formula C32H21N5Na2O8S2 and molecular weight 713.647 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Direct Red 31 (CAS 5001-72-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1353510-8 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.