1,5-Naphthalenediol for synthesis
1,5-Dihydroxynaphthalene
CAS: 83-56-7
Molecular Formula: C10H8O2
1,5-Naphthalenediol for synthesis - Names and Identifiers
| Name | 1,5-Dihydroxynaphthalene |
| Synonyms | 1,5-NAPHTHALENEDIOL Naphthalene-1,5-diol 1,5-DihydroxynaphthaL 1,5-Dihydroxy phthalene 1,5-Dihydroxynaphthalene 1,5-DIHYDROXYNAPHTHALENE 1,8-NAPHTHALENEDIMETHANOL 1,5-Naphthalenediol for synthesis |
| CAS | 83-56-7 |
| EINECS | 201-487-4 |
| InChI | InChI=1/C10H8O2/c11-9-5-1-3-7-8(9)4-2-6-10(7)12/h1-6,11-12H |
1,5-Naphthalenediol for synthesis - Physico-chemical Properties
| Molecular Formula | C10H8O2 |
| Molar Mass | 160.17 |
| Density | 1.33g/cm3 |
| Melting Point | 259-261℃ |
| Boling Point | 375.4°C at 760 mmHg |
| Flash Point | 193.5°C |
| Solubility | Soluble in ether and acetone, slightly soluble in alcohol and acetic acid, hardly soluble in water, insoluble in benzene and petroleum ether. |
| Vapor Presure | 3.62E-06mmHg at 25°C |
| Appearance | White crystal |
| Storage Condition | RT, dark |
| Refractive Index | 1.725 |
| MDL | MFCD00003980 |
| Physical and Chemical Properties | Character: White needle-like crystal. melting point 265 ℃ solubility insoluble in water, benzene, petroleum ether, soluble in ethanol, ether, acetone. |
| Use | Is an intermediate in the synthesis of mordant azo dyes |
1,5-Naphthalenediol for synthesis - Risk and Safety
| Hazard Symbols | Xn - Harmful N - Dangerous for the environment  |
| Risk Codes | R22 - Harmful if swallowed R36 - Irritating to the eyes R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S29 - Do not empty into drains. S39 - Wear eye / face protection. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
1,5-Naphthalenediol for synthesis - Upstream Downstream Industry
1,5-Naphthalenediol for synthesis - Introduction
The alkaline solution turns brown in the air.
Last Update：2022-10-16 17:29:14
1,5-Naphthalenediol for synthesis - Nature
| storage conditions | Inert atmosphere,Room Temperature |
| solubility | 0.6g/l |
| acidity coefficient (pKa) | 9.28±0.40(Predicted) |
| PH value | 6 (0.5g/l, H2O, 20℃) |
| water solubility | Soluble in water. |
| BRN | 2044951 |
| NIST chemical information | 1,5-Naphthalenediol(83-56-7) |
| EPA chemical information | 1,5-Naphthalenediol (83-56-7) |
Last Update：2024-04-10 22:29:15
1,5-Naphthalenediol for synthesis - Security information
| WGK Germany | 2 |
| RTECS number | QJ4740000 |
| F | 8-21 |
| TSCA | Yes |
| customs code | 29072900 |
Last Update：2024-04-10 22:29:15
1,5-Naphthalenediol for synthesis - Uses and synthesis methods
chemical properties
white needle crystal. Insoluble in water, benzene, petroleum ether, soluble in ethanol, ether, acetone.
use
1, used in organic synthesis, dye intermediates, pharmaceutical intermediates, photographic industry.
2, is an intermediate for the synthesis of mordant azo dyes
production method
It is obtained from 1, 5-naphthalene disulfonic acid through alkali fusion and acidification. Heat the sodium hydroxide solution to 290 ℃, add 1,5-naphthalene disulfonic acid under stirring, add it between 280-300 ℃, and continue stirring for 30min. Cool and acidify with hydrochloric acid to pH6-7. Cooling, filtering and refining to obtain 1, 5-dihydroxynaphthalene.
Last Update：2024-04-10 22:29:15
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View History
Raw Materials for 1,5-Naphthalenediol for synthesis
Sulfuric acid
1,5-naphthylene di(acetate)
5-Amino-1-naphthol
Disodium 1,5-naphthalenedisulfonate
Sodium 4-amino-1-naphthalenesulfonate
1,5-naphthylene di(acetate)
5-Amino-1-naphthol
Disodium 1,5-naphthalenedisulfonate
Sodium 4-amino-1-naphthalenesulfonate
Downstream Products for 1,5-Naphthalenediol for synthesis
PLUMBAGIN
Mordant Black 9
5-Methoxy-1-naphthalenol
Acid mordant Black 7
sodium 3-[(1,5-dihydroxy-2-naphthyl)azo]-4-hydroxy-5-nitrobenzenesulphonate
Mordant Black 9
Mordant Black 9
5-Methoxy-1-naphthalenol
Acid mordant Black 7
sodium 3-[(1,5-dihydroxy-2-naphthyl)azo]-4-hydroxy-5-nitrobenzenesulphonate
Mordant Black 9