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2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-(phenylazo)-, also known as Acid Orange 52, is an organic compound with the chemical formula C16H12N2O6S2. It is a synthetic azo dye characterized by its bright orange color and is widely used in various industries, including textiles, leather, and paper, for coloring purposes. The compound is derived from naphthalene, a polycyclic aromatic hydrocarbon, and features two sulfonic acid groups, which contribute to its water solubility and affinity for cellulose fibers. The presence of the phenylazo group in its structure imparts the characteristic orange hue, making it a popular choice for dyeing applications. However, due to its potential environmental and health concerns, its use is regulated in some regions, and alternative, more eco-friendly dyes are being developed.

3626-43-5

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Basic information
1. Product Name: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-(phenylazo)-
2. Synonyms:
3. CAS NO:3626-43-5
4. Molecular Formula: C16H12N2O7S2
5. Molecular Weight: 408.412
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 3626-43-5.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-(phenylazo)-(CAS DataBase Reference)
10. NIST Chemistry Reference: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-(phenylazo)-(3626-43-5)
11. EPA Substance Registry System: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-(phenylazo)-(3626-43-5)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 3626-43-5(Hazardous Substances Data)

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3626-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3626-43-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,2 and 6 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3626-43:
(6*3)+(5*6)+(4*2)+(3*6)+(2*4)+(1*3)=85
85 % 10 = 5
So 3626-43-5 is a valid CAS Registry Number.

3626-43-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name	3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid

1.2 Other means of identification

Product number	-
Other names	1-Benzolazo-2-hydroxynaphthalin-3,6-disulfonsaeure

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:3626-43-5 SDS

3626-43-5Upstream product

148-75-4 2-naphthol-3,6-disulphonic acid

3626-43-5Downstream Products

3626-43-5Relevant academic research and scientific papers

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