1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt

Basic Information

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CAS Number

887-76-3

Molecular Formula

C10H6N2O4S

Molecular Weight

252.25 g/mol

EINECS

212-958-9

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Basic Chemical Raw Materials Organic Chemicals Nitriles

Fine Chemicals Dyes and Pigments Organic Dyes

Basic Physical Properties

Melting Point

160 °C (dec.)

Boiling Point

160 C

Density

1.5366 (rough estimate)

Water Solubility

15.8 g/L (20 ºC)

Refractive Index

1.6800 (estimate)

SMILES

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C1=CC=C2C(=C1)C(=CC(=C2[N+]#N)O)S(=O)(=O)[O-]

InChI

InChI=1S/C10H6N2O4S/c11-12-10-7-4-2-1-3-6(7)9(5-8(10)13)17(14,15)16/h1-5H,(H-,13,14,15,16)

InChIKey

QHIBNGIZPPHJAT-UHFFFAOYSA-N

LogP

2.25176

Complexity

422

Safety Information

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GHS Hazard Pictograms

H228

H314

Hazard Statement

H228 Flammable solid
Flammable solids

H314 Causes severe skin burns and eye damage
Skin corrosion/irritation

Hazard Class

Class 4.1 Class 4.1

Synonyms & References

English

4,4’-azo-3-hydroxynaphthalene-1-sulfonate
1,2-Naphthoxydiazo-4-sulfonic acid
1-DIAZO-2-NAPHTHOL-4-SULFONIC ACID
1 DIAZO-2-NAPHTHOL-4-SULPHONIC ACID
4,4'-azo-3-hydroxynaphthalene-1-sulphonate
1-Diazo-2-naphthol-4-sulfonic acid, contains ca. 25% moisture, 97%
2-Hydroxy-4-sulfo-1-naphthalenediazonium hydroxide, inner salt
4-Diazonio-3-hydroxynaphthalene-1-sulfonate
1-Diazo-2-naphthol-4-sulfonic acid
1,2-Naphthoxydiazde-4-sulfonicacid
1,2-Naphthoxydiazo-4-sulfo
1-Diazo-2-naphthol-4
1-Naphthalenediazonium,2-hydroxy-4-sulfo-,innersalt
2-hydroxy-4-sulfo-naphthalene-1-diazonium-betaine
2-Hydroxy-4-sulfo-naphthalin-1-diazonium-betain
4,4'-azo-3-hydroxynaphthalene-1-sulfonate
4-Diazonio-3-hydroxy-naphthalin-1-sulfonat
4-diazonio-3-hydroxynaphthalene-1-sulfonate
AKOS015902631
1-Diazo-2-naphthol-4-sulfonic acid, powder
DTXCID9048643
EC 212-958-9
887-76-3
EINECS 212-958-9
QHIBNGIZPPHJAT-UHFFFAOYSA-N
1-Naphthalenediazonium, 2-hydroxy-4-sulfo-, hydroxide, inner salt
LS-13736
NS00008759
1-Naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt
D89908
4857-47-0

MDL Number

MFCD00012409

EC Number

212-958-9

Customs Code

29270000

FAQ

What are the physical and chemical properties of 1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt (CAS: 887-76-3)?

1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt has a crystalline form and a molecular weight of approximately 301.11 g/mol. It is mildly soluble in water and has a pKa of 10.1. This inner salt is reactive towards nucleophiles and can undergo diazo displacement reactions. It is typically stored in cool, dark places to prevent photodegradation.

How is 1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt (CAS: 887-76-3) typically synthesized?

1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt is typically synthesized by diazotization of 1-naphthol and subsequent sulfonation. The diazotization is carried out in an acidic medium using sodium nitrite and sulfuric acid. The sulfonation step is conducted with sulfur trioxide in pyridine. The reaction is monitored by TLC and the product is recrystallized from water to obtain the inner salt.

What industries use 1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt (CAS: 887-76-3)?

1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt is used in the pharmaceutical industry for the synthesis of certain drugs and intermediates. It is also utilized in the production of dyes and pigments, as a precursor in organic synthesis, and as a reagent in analytical chemistry for spectroscopic studies and as a sensitizer in photochemistry.

What precautions should be taken when handling 1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt (CAS: 887-76-3)?

When handling 1-naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt, use appropriate personal protective equipment (PPE) such as gloves, safety goggles, and a lab coat. Work in a well-ventilated area or fume hood to avoid inhalation of fumes. Store the compound in a cool, dry place away from direct sunlight. In case of a spill, neutralize with an appropriate base and dispose of according to local regulations. Always consult the Safety Data Sheet (SDS) for specific handling instructions.