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1,5-Dihydroxy naphthalene

Product Name
1,5-Dihydroxy naphthalene
CAS No.
83-56-7
Chemical Name
1,5-Dihydroxy naphthalene
Synonyms
1,5-DIHYDROXYNAPHTHALENE;Naphthalene-1,5-diol;1,5-NAPHTHALENEDIOL;CI 76625;c.i.76625;C.I. 76625;oxidationbase;Oxidation Base;durafurdevelopere;1,5-Naphthalindiol
CBNumber
CB2685052
Molecular Formula
C10H8O2
Formula Weight
160.17
MOL File
83-56-7.mol
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1,5-Dihydroxy naphthalene Property

Melting point:
259-261 °C (dec.) (lit.)
Boiling point:
246.06°C (rough estimate)
Density 
1.0924 (rough estimate)
vapor pressure 
0-0Pa at 25℃
refractive index 
1.5418 (estimate)
Flash point:
252°C
storage temp. 
Inert atmosphere,Room Temperature
solubility 
0.6g/l
pka
9.28±0.40(Predicted)
form 
Solid
color 
Pale Beige to Very Dark Brown
PH
6 (0.5g/l, H2O, 20℃)
Water Solubility 
Soluble in water.
BRN 
2044951
LogP
1.7-1.82 at 23℃
CAS DataBase Reference
83-56-7(CAS DataBase Reference)
NIST Chemistry Reference
1,5-Naphthalenediol(83-56-7)
EPA Substance Registry System
1,5-Naphthalenediol (83-56-7)
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Safety

Hazard Codes 
Xn,N,Xi
Risk Statements 
22-51/53-36-36/37/38
Safety Statements 
22-24/25-61-39-29-26
WGK Germany 
2
RTECS 
QJ4740000
8-21
TSCA 
Yes
HS Code 
29072900
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

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

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

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

P337+P313IF eye irritation persists: Get medical advice/attention.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
D115606
Product name
1,5-Dihydroxynaphthalene
Purity
97%
Packaging
100g
Price
$54.4
Updated
2024/03/01
Sigma-Aldrich
Product number
D115606
Product name
1,5-Dihydroxynaphthalene
Purity
97%
Packaging
500g
Price
$203
Updated
2024/03/01
TCI Chemical
Product number
D0590
Product name
1,5-Dihydroxynaphthalene
Purity
>98.0%(GC)
Packaging
25g
Price
$33
Updated
2024/03/01
TCI Chemical
Product number
D0590
Product name
1,5-Dihydroxynaphthalene
Purity
>98.0%(GC)
Packaging
100g
Price
$88
Updated
2024/03/01
Alfa Aesar
Product number
L04599
Product name
1,5-Dihydroxynaphthalene, 98%
Packaging
250g
Price
$56.65
Updated
2024/03/01
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1,5-Dihydroxy naphthalene Chemical Properties,Usage,Production

Chemical Properties

Grey powder 1,5-Naphthalenediol [83-56-7], 1,5-dihydroxynaphthalene, Azurol, C10H8O2, Mr 160.16, forms colorless needles (from aqueous methyl cellosolve). The compound is sublimable, readily soluble in ether and acetone, but only sparingly soluble in water and hydrocarbons. It is oxidized to 5-hydroxy-1,4-naphthoquinone ( juglone) by CrO3. Amination gives 1,5-naphthalenediamine; coupling with diazotized anilines occurs in the 2- or 4-position.

Uses

1,5-Dihydroxynaphthalene is an intermediate of synthetic mordant azo dyes. It is an intermediate used in organic synthesis, pharmaceuticals, dyestuff fields and photograph industry. It is used as a coupling component in azo dyes as exemplified in the metallizable (Cr) wool dye, C.I. Mordant Black 9.

Production Methods

The sodium salt of naphthalene-1,5-disulfonic acid is added gradually to excess 75 % sodium hydroxide. The mixture is heated under pressure to 276℃ over the course of 7 h and the reaction is completed by heating for a further 5 h at this temperature. After precipitation with sulfuric acid, the product is isolated in 90 % yield.

Purification Methods

The diol (~30g) is purified by making into a thick paste with H2O and suspending this in 3L of H2O containing 200mL of EtOH, boiling under reflux for 3hours, cooling to 30o, saturating with SO2, digesting below the boiling point for 1hour and filtering fast through a large hot filter paper. The hot filtrate is poured onto crushed ice whereby the diol (15-20g) separates as colourless needles (m 258o) [Wheeler & Ergle J Am Chem Soc 52 4873 1930]. Recrystallise it from H2O or nitromethane under N2 to avoid oxidation. The dibenzoyl derivative has m 245o (from EtOH). The 5-methoxy-1-naphthol derivative [prepared from the diol in MeOH/HCl (1:30 weight to volume ratio) and set aside at 25o for 9-10days] crystallised from pet ether (m 135-136o) or from CH2Cl2/hexane (needles m 140o) [Bell & McCaffrey Aust J Chem 46 731 1993]. [Beilstein 6 I 477, 6 II 950, 6 III 5265, 6 IV 6554.]

1,5-Dihydroxy naphthalene Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from 1,5-Dihydroxy naphthalene manufacturers

Henan Fengda Chemical Co., Ltd
Product
1,5-Dihydroxy naphthalene 83-56-7
Price
US $100.00-1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
g-kg-tons, free sample is available
Release date
2023-12-24
Hebei Duling International Trade Co. LTD
Product
1,5-Dihydroxy naphthalene 83-56-7
Price
US $30.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20 tons
Release date
2023-04-07
WUHAN FORTUNA CHEMICAL CO., LTD
Product
1,5-Dihydroxy naphthalene 83-56-7
Price
US $0.00/KG
Min. Order
1KG
Purity
98%min
Supply Ability
30tons/month
Release date
2023-02-23

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