Contact us: +91 9550333722 040 - 40102781
Structured search
India
Choose your country
Different countries will display different contents
Try our best to find the right business for you.
My chemicalbook

Welcome back!

HomeProduct name list1,8-Diaminonaphthalene

1,8-Diaminonaphthalene

Synonym(s):1,8-Diaminonaphthalene, 1,8-Naphthylenediamine;1,8-Naphthalenediamine

  • CAS NO.:479-27-6
  • Empirical Formula: C10H10N2
  • Molecular Weight: 158.2
  • MDL number: MFCD00004033
  • EINECS: 207-529-8
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-12-18 14:08:52
1,8-Diaminonaphthalene Structural

What is 1,8-Diaminonaphthalene?

Chemical properties

Off white powder. 1,8-Naphthalenediamine [479-27-6]. 1,8-diaminonaphthalene, Deltamin, C10H10N2, Mr 158.2, turns brown in air even in the absence of light. Its solutions give a brown precipitate on addition of iron(III) chloride. Treatment with boiling aqueous sodium bisulfite followed by addition of alkali gives 8-amino-1-hydroxynaphthalene. Sulfonation takes place in the 4- position. Coupling with azo compounds also occurs in the 4-position, but in almost neutral solution 4,5-bis coupling can occur. The resulting bisazo compound is reduced with SnCl2– HCl to give 1,4,5,8-tetraaminonaphthalene.

The Uses of 1,8-Diaminonaphthalene

1,8-Diaminonaphthalene is an important raw material and intermediate used in organic synthesis, pharmaceuticals and agrochemicals.

The Uses of 1,8-Diaminonaphthalene

Lubricating-oil antioxidant, analytical reagent

Production Methods

Reduction of 1,8-dinitronaphthalene is carried out with iron and acetic acid in xylene or by catalytic hydrogenation.

Flammability and Explosibility

Non flammable

Purification Methods

Crystallise 1,8-diaminonaphthalene from water or aqueous EtOH, and sublime it in a vacuum. The N,N'-dimethyl derivative [20734-56-9] has m 103-104o and pK2 5 5.61, the N,N,N'-trimethyl-derivative [20734-57-0] has m 29-30o and pK2 5 6.43. [Hodgson et al. J Chem Soc 202 1945, Beilstein 13 IV 344.]

Properties of 1,8-Diaminonaphthalene

Melting point: 60-65 °C (lit.)
Boiling point: 205 °C/12 mmHg (lit.)
Density  1.1265
vapor pressure  0.011Pa at 25℃
refractive index  1.6829
Flash point: 205°C/12mm
storage temp.  Store below +30°C.
solubility  methanol: soluble
form  Chunks or Crystalline Mass
pka 4.46±0.10(Predicted)
color  Grayish-red to gray or dark brown
Water Solubility  slightly soluble
Merck  14,6372
BRN  742841
Stability: Air Sensitive
CAS DataBase Reference 479-27-6(CAS DataBase Reference)
NIST Chemistry Reference 1,8-Naphthalenediamine(479-27-6)
EPA Substance Registry System 1,8-Naphthalenediamine (479-27-6)

Safety information for 1,8-Diaminonaphthalene

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
ghs
Health Hazard
GHS08
GHS Hazard Statements H302:Acute toxicity,oral
H317:Sensitisation, Skin
H351:Carcinogenicity
Precautionary Statement Codes P201:Obtain special instructions before use.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352:IF ON SKIN: wash with plenty of soap and water.
P308+P313:IF exposed or concerned: Get medical advice/attention.

Computed Descriptors for 1,8-Diaminonaphthalene

InChIKey YFOOEYJGMMJJLS-UHFFFAOYSA-N

Related products of tetrahydrofuran

You may like

Statement: All products displayed on this website are only used for non medical purposes such as industrial applications or scientific research, and cannot be used for clinical diagnosis or treatment of humans or animals. They are not medicinal or edible.