2,4-DICHLORO-1-NAPHTHOL Property

Melting point:

104-107 °C(lit.)

Boiling point:

305.89°C (rough estimate)

Density 

1.2937 (rough estimate)

vapor density 

7.3 (vs air)

refractive index 

1.5500 (estimate)

storage temp. 

2-8°C

solubility 

pyridine: soluble5%, clear, colorless to dark yellow

form 

powder

color 

off-white to tan

CAS DataBase Reference

2050-76-2(CAS DataBase Reference)

EPA Substance Registry System

1-Naphthalenol, 2,4-dichloro- (2050-76-2)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

HS Code 

29081990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

2,4-DICHLORO-1-NAPHTHOL Chemical Properties,Usage,Production

Chemical Properties

beige-yellowish crystalline powder

Uses

2,4-Dichloro-1-naphthol has been used in:

• spectrophotometric determination of arginine with previous modifications of the Sakaguchi reaction
• guanidinoacetate and guanidinosuccinate assay of urine, an indicator of kidney dysfunction

Purification Methods

Crystallise the naphthol pKEst from MeOH. The 1-methyl ether has m 58o (from EtOH). [Beilstein 6 H 612, 6 I 308, 6 II 582, 6 III 2934, 6 IV 4233.]