1. Product information
| Product Name: | 1,5-Dihydroxy naphthalene |
| Synonyms: | 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 |
| CAS: | 83-56-7 |
| MF: | C10H8O2 |
| MW: | 160.17 |
| EINECS: | 201-487-4 |
| Product Categories: | Intermediates of Dyes and Pigments;Naphthalene derivatives;Indazoles;bc0001 |
| Mol File: | 83-56-7.mol |
 |
|
| 1,5-Dihydroxy naphthalene Chemical Properties |
| 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) |
| Fp | 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. |
| 1,5-Dihydroxy naphthalene Usage And Synthesis |
| 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. |
2. Packaging
For powders: normal is 25kgs/Drum or bag, or larger/smaller package as request.
For liquids: normal 25kgs/drum, 180-300kgs/bucket, or IBC, determined by the nature of the product.
Or smaller package 1kg/bottle, 10kgs/bottle as request.
3. Shipping
4. Contact information
For more details, pls contact us freely.
Email address : elin@fdachem.com
Mob: 86 13613820652
WhatsApp/Skype/Wechat/LINE: 86 13613820652
China
