4-(phenylamino)-Benzenesulfonic acid (CAS 101-57-5)

Chinese name: 二苯基胺-4-磺酸

4-(phenylamino)-Benzenesulfonic acid is registered under CAS 101-57-5. Molecular formula: C12H11NO3S. Approximate molecular weight: 249.29. SKYSEVEN Chemical provides industrial chemical sourcing support and free CAS tools for global B2B buyers.

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Physical & identity data

CAS Number	101-57-5
English name	4-(phenylamino)-Benzenesulfonic acid
Chinese name	二苯基胺-4-磺酸
Molecular formula	C12H11NO3S
Molecular weight	249.29
HS code (ref.)	2921499090

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Authority references

• PubChem
• NIST Chemistry WebBook
• CAS Common Chemistry

FAQ

What is CAS 101-57-5?

4-(phenylamino)-Benzenesulfonic acid is identified by CAS Registry Number 101-57-5. Molecular formula: C12H11NO3S. SKYSEVEN Chemical provides industrial chemical supply and free CAS lookup tools.

Where can I buy 4-(phenylamino)-Benzenesulfonic acid?

Request a quote on cnchemshop.com. SKYSEVEN Chemical supplies industrial grades with COA/SDS on request for export orders.

How do I verify CAS 101-57-5 data?

Cross-check PubChem / NIST / CAS Common Chemistry, and use our free CAS lookup tool. Always match CAS on COA and invoice.

Data is for informational reference only. Verify lot-specific values with COA/SDS. Not for medical advice.