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HomeProduct name list2-HYDROXY-1-NAPHTHOIC ACID

2-HYDROXY-1-NAPHTHOIC ACID

  • CAS NO.:2283-08-1
  • Empirical Formula: C11H8O3
  • Molecular Weight: 188.18
  • MDL number: MFCD00004009
  • EINECS: 218-919-2
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-29 11:48:30
2-HYDROXY-1-NAPHTHOIC ACID Structural

What is 2-HYDROXY-1-NAPHTHOIC ACID?

Chemical properties

2-Hydroxy-1-naphthoic acid [2283-08-1], C11H8O3, Mr 188.17, has a mp of 156 – 157℃ (decomp. to 2-naphthol and CO2). The monosodium salt is unstable in hot aqueous solution. 2- Hydroxy-1-naphthoic acid is decarboxylated by nitrous acid, forming 1-nitroso-2-naphthol, and by diazo salts, forming a 1-azo-2-naphthol. An ethanolic solution of 2-hydroxy-1-naphthoic acid gives a dark blue color with iron(III) chloride. Chlorosulfonic acid at 30℃ gives the 6-sulfonyl chloride derivative.

The Uses of 2-HYDROXY-1-NAPHTHOIC ACID

?2-Hydroxy-1-naphthoic acid is an intermediate of minor importance in the synthesis of azo dyes.

Production Methods

Treatment of the dried sodium or potassium salt of 2-naphthol with carbon dioxide at 120 C under pressure gives an 80 % yield of product after careful work-up. Solvents such as toluene, tetralin, or diphenyl oxide are patented alternatives.

Properties of 2-HYDROXY-1-NAPHTHOIC ACID

Melting point: 167 °C (dec.) (lit.)
Boiling point: 283.17°C (rough estimate)
Density  1.2100 (rough estimate)
refractive index  1.6400 (estimate)
storage temp.  Sealed in dry,Room Temperature
pka pK1:3.29;pK2:9.68 (20°C)
form  powder to crystal
color  White to Light red to Green
BRN  975575
CAS DataBase Reference 2283-08-1(CAS DataBase Reference)
EPA Substance Registry System 1-Naphthalenecarboxylic acid, 2-hydroxy- (2283-08-1)

Safety information for 2-HYDROXY-1-NAPHTHOIC ACID

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P271:Use only outdoors or in a well-ventilated area.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352:IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 2-HYDROXY-1-NAPHTHOIC ACID

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