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Name	1,5-Dihydroxy naphthalene	EINECS	201-487-4
CAS No.	83-56-7	Density	1.33 g/cm³
PSA	40.46000	LogP	2.25100
Solubility	Soluble in water.	Melting Point	259-261 °C (dec.)(lit.)
Formula	C₁₀H₈O₂	Boiling Point	375.4 °C at 760 mmHg
Molecular Weight	160.172	Flash Point	193.5 °C
Transport Information	N/A	Appearance	gray powder
Safety	22-24/25-61-39-29-26	Risk Codes	22-51/53-36-36/37/38
Molecular Structure		Hazard Symbols	Xn, N, Xi
Synonyms	1,5-Dihydroxynaphthaline;1,5-Naphthohydroquinone;C.I. 76625;DurafurDeveloper E;1,5-Naphthalenediol;Oxidation Base;	Article Data	35

1,5-Dihydroxy naphthalene Synthetic route

: 605-89-0
1,5-diacetoxynaphthalene

A: 83-56-7
1,5-dihydroxynaphthalene

B: 94807-85-9
5-hydroxynaphthalen-1-yl acetate

Conditions

Conditions	Yield
With lipase of Pseudomonas sp; water In various solvent(s) at 25℃; for 2.5h; Hydrolysis; deacetylation;	A 60% B 40%

: 10075-63-5
1,5-dimethoxynaphthalene

A: 3588-80-5
5-methoxynaphthalen-1-ol

B: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
With Cyclohexyl iodide In N,N-dimethyl-formamide for 2.5h; Heating;	A 43% B 44%

: 90-15-3
α-naphthol

A: 575-38-2
1,7-Dihydroxynaphthalene

B: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
With dihydrogen peroxide; hydrogen fluoride; antimony pentafluoride at -20℃; for 0.5h; Mechanism; Product distribution;	A 17.5% B 25.5%
With dihydrogen peroxide; hydrogen fluoride; antimony pentafluoride at -20℃; for 0.5h;	A 17.5% B 25.5%

: 83-55-6
5-amino-1-naphthol

: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
With sodium hydrogensulfite alkal. Verseifung des entstandenen Sulfits;

: 117-59-9
1-hydroxynaphthalene-5-sulphonic acid

: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
With potassium carbonate beim Schmelzen;
With potassium carbonate at 200℃;
With sodium hydroxide at 220 - 260℃; beim Schmelzen;

: 84-89-9
1-aminonaphthalene-5-sulfonic acid

: furan-2,3,5(4H)-trione pyridine (1:1)

A: 83-55-6
5-amino-1-naphthol

B: 117-59-9
1-hydroxynaphthalene-5-sulphonic acid

C: 83-56-7
1,5-dihydroxynaphthalene

D: 134-32-7
1-amino-naphthalene

Conditions

Conditions	Yield
at 220 - 300℃; im Autoklaven;

...Expand

: 84-89-9
1-aminonaphthalene-5-sulfonic acid

: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
With sodium hydroxide at 220 - 300℃; unter Druck;

: 8-hydroxy-4-oxo-1,2,3,4-tetrahydro-naphthalene-2-sulfonic acid ; sodium salt

: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
beim Erhitzen;

: 81-04-9
naphthalene-1,5-disulfonate

: 83-56-7
1,5-dihydroxynaphthalene

: 81-04-9
naphthalene-1,5-disulfonate

alkalies: alkalies

: 83-56-7
1,5-dihydroxynaphthalene

Conditions

Conditions	Yield
at 300℃;
at 220 - 260℃;

1,5-Dihydroxy naphthalene Chemical Properties

IUPAC Name: Naphthalene-1,5-diol
Molecular Formula: C₁₀H₈O₂
Molecular Weight: 160.17 g/mol
Canonical SMILES: c12c(c(ccc2)O)cccc1O
InChI: InChI=1/C10H8O2/c11-9-5-1-3-7-8(9)4-2-6-10(7)12/h1-6,11-12H
EINECS: 201-487-4
Classification Code: Mutation data
Product Categories: Intermediates of Dyes and Pigments; Naphthalene derivatives
XLogP3: 1.8
H-Bond Donor: 2
H-Bond Acceptor: 2
Surface Tension: 64.4 dyne/cm
Density: 1.33 g/cm³
Flash Point: 193.5 °C
Enthalpy of Vaporization: 64.73 kJ/mol
Boiling Point: 375.4 °C at 760 mmHg
Melting Point: 259-261 °C (dec.)(lit.)
Vapour Pressure of 1,5-Dihydroxy naphthalene (CAS NO.83-56-7): 3.62E-06 mmHg at 25 °C

1,5-Dihydroxy naphthalene Uses

1,5-Dihydroxy naphthalene (CAS NO.83-56-7) is used as oxidising colouring agents for hair dyeing.

1,5-Dihydroxy naphthalene Toxicity Data With Reference

1.		dlt-oin-oin-par 10 ppm		EVETBX Environmental Entomology. 2 (1973),1029.
2.		dlt-oin-oin-skn 10 ppm		EVETBX Environmental Entomology. 2 (1973),1029.

1,5-Dihydroxy naphthalene Consensus Reports

Reported in EPA TSCA Inventory.

1,5-Dihydroxy naphthalene Safety Profile

Mutation data reported. When heated to decomposition it emits acrid smoke and irritating vapors.
Hazard Codes: Harmful Xn, Dangerous N, Irritant Xi
Risk Statements: 22-51/53-36-36/37/38
R22: Harmful if swallowed.
R51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R36: Irritating to eyes.
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 22-24/25-61-39-29-26
S22: Do not breathe dust.
S24/25: Avoid contact with skin and eyes.
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.
S39: Wear eye / face protection.
S29: Do not empty into drains.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany: 2
RTECS of 1,5-Dihydroxy naphthalene (CAS NO.83-56-7): QJ4740000

1,5-Dihydroxy naphthalene Specification

1,5-Dihydroxy naphthalene (CAS NO.83-56-7), its Synonyms are 1,6-Naphthalenediol ; CI 76625 ; Durafur Developer E ; Oxidation Base ; 1,5-Naphthalenediol . It is gray powder.

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