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
F: 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

FUMING SULFURIC ACID Naphthalene 1,5-Naphthalenedisulfonic acid Sulfuric acid

Preparation Products

PLUMBAGIN Mordant Black 9

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View Lastest Price from 1,5-Dihydroxy naphthalene manufacturers

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

Hebei Weibang Biotechnology Co., Ltd

Product: 1,5-Dihydroxy naphthalene 83-56-7
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 20 mt
Release date: 2024-11-22

Baoji Guokang Bio-Technology Co., Ltd.

Product: 1,5-Dihydroxy naphthalene 83-56-7
Price: US $15.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 1 ton
Release date: 2021-06-08

83-56-7, 1,5-Dihydroxy naphthaleneRelated Search:

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Naphthalene-1,5-diol

1,8-NAPHTHALENEDIMETHANOL

1,5-DIHYDROXYNAPHTHALENE

1,5-NAPHTHALENEDIOL

1,5-Dihydroxynaphthalene 97%

1,5-Dihydroxy phthalene

1,5-Naphthalenediol for synthesis

1,5-DihydroxynaphthaL

C.I. 76625

c.i.76625

CI 76625

Durafur Developer E

durafurdevelopere

Oxidation Base

oxidationbase

1,5-Naphthalindiol

1,5-dihydroxyl-naphthalene

1,5-Dihydroxynaphthylene

1,5-DIHYDROXYNAPHTHALENE pure

1,5-Dihydroxynaphthaline

1,5-Dihydroxynaphthalene,99%

1,5-Dihydroxynaphthalene,1,5-Naphthalenediol

1,5-Dihydroxynaphthalene &gt

1, 5-Dihydxoxynaphthalene

1,5-Dihydroxy naphthalene ISO 9001：2015 REACH

1,5-Dihydroxynaphtha

83-56-7

Building Blocks

Organic Building Blocks

Polyols

Oxygen Compounds

Intermediates of Dyes and Pigments

Naphthalene derivatives

Indazoles

bc0001