Acid Orange 7
Also known as: C.I. 15510, Orange II, Orange II sodium salt, Orange 7, Sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate, Sodium 4-[(2-hydroxy-1-naphthyl)diazenyl]benzenesulfonate, 4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid sodium salt, Benzenesulfonic acid, 4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-, sodium salt (1:1), tropaeolin ooo
Acid Orange 7 (CAS 633-96-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H11N2NaO4S and a molecular weight of 350.324 g/mol. Key property: a melting point of 164°C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 633-96-5
- Jingsj CID
- J-29746-1
- Molecular Formula
- C16H11N2NaO4S
- Molecular Weight
- 350.324 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 164°C |
|---|---|
| Exact Mass | 350.033722 |
| PSA | 110.53000 |
| LogP | 4.94570 |
| Additional Property | 116 g/L (30 ºC) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Fang Zhang, et al. Decolorization of Acid Orange 7 by extreme-thermophilic mixed culture. Bioresour Technol. 2019 Nov;291:121875. [2]. Mohamad Ghalebizade, et al. Acid Orange 7 treatment and fate by electro-peroxone process using novel electrode arrangement. Chemosphere. 2019 Nov;235:1007-1014. |
|---|
Customs & Trade Information
| HS Code | 3204120000 |
|---|
Frequently Asked Questions
What is the CAS number of Acid Orange 7?
The CAS number of Acid Orange 7 is 633-96-5.
What are the molecular formula and molecular weight of Acid Orange 7?
Acid Orange 7 has molecular formula C16H11N2NaO4S and molecular weight 350.324 g/mol.
Which suppliers offer Acid Orange 7?
1 supplier(s) listed; request a quote for pricing.
Is Acid Orange 7 hazardous?
Acid Orange 7 has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Acid Orange 7?
For Acid Orange 7, Upstream Products: 2-Naphthol, Sulfanilic acid; Downstream Products: 2-Hydroxy-1,4-naphthoquinone, Sulfanilic acid, p-Diazobenzenesulfonic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Acid Orange 7 (CAS 633-96-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29746-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.