1,4,5,8-naphthalenetetracarboxylic acid hydrate
1,4,5,8-naphthalenetetracarboxylic acid hydrate
CAS: 128-97-2
Molecular Formula: C14H8O8
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Names and Identifiers
| Name | 1,4,5,8-naphthalenetetracarboxylic acid hydrate |
| Synonyms | 1,4,5,8-Tetracarboxynaphthalene 1,4,5,8-naphthalenetetraformicacid 1,4,5,8-Naphthalenetetracarbonic acid 1,4,5,8-Naphthalenetetracaboxylic Acid 1,4,5,8-Naphthalenetetracarboxylic acid 1,4,5,8-NAPHTHALENETETRACARBOXYLIC ACID naphthalene-1,4,5,8-tetracarboxylic acid 1,4,5,8-naphthalenetetracarboxylic acid hydrate |
| CAS | 128-97-2 |
| EINECS | 204-924-7 |
| InChI | InChI=1/C14H8O8/c15-11(16)5-1-2-6(12(17)18)10-8(14(21)22)4-3-7(9(5)10)13(19)20/h1-4H,(H,15,16)(H,17,18)(H,19,20)(H,21,22) |
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Physico-chemical Properties
| Molecular Formula | C14H8O8 |
| Molar Mass | 304.21 |
| Density | 1.5387 (rough estimate) |
| Melting Point | 180 °C |
| Boling Point | 405.05°C (rough estimate) |
| Flash Point | 414°C |
| Water Solubility | Soluble in water |
| Vapor Presure | 7.33E-23mmHg at 25°C |
| Appearance | Pale yellow solid |
| Color | White to Light yellow to Light orange |
| pKa | 1.03±0.10(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.5500 (estimate) |
| Physical and Chemical Properties | Character: white crystal. solubility insoluble in ethanol, chloroform, benzene. Soluble in aqueous acetone. |
| Use | For dyes, pigments, resins and other intermediates |
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36 - Irritating to the eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 2 |
| RTECS | QK3690000 |
| HS Code | 29173990 |
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Upstream Downstream Industry
| Raw Materials | Malononitrile Naphthalene |
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Nature
Open Data Verified Data
white crystals, leaf-like or needle-like crystals were obtained from aqueous hydrochloric acid. No specific melting point, if the rapid heating to 200~250 deg C decomposition. If the slow heating to 140~150 deg C is 1,4,5,8 A naphthalene four acid two anhydride. Slightly soluble in water and hot acetic acid, soluble in aqueous acetone, very slightly soluble in benzene, chloroform, carbon disulfide and ethanol.
Last Update：2024-01-02 23:10:35
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Preparation Method
Open Data Verified Data
The production of the product has a pyrene method and a pyridine method.
- pyrene method is obtained by chlorination and oxidation of pyrene as raw material.
- carbamoyl chloride method.
Last Update：2022-01-01 10:43:52
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Use
Open Data Verified Data
This product is used in the plastic industry to manufacture a new type of resin, polyimide and TNM polymer, which has good insulation and radiation resistance, and can be resistant to high temperature (above 400 ℃).
Last Update：2022-01-01 10:43:52
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Safety
Open Data Verified Data
The toxicity of this product is very small. There is a slight sour taste. As long as the working environment is well ventilated, it will not harm human health.
Last Update：2022-01-01 10:43:53
1,4,5,8-naphthalenetetracarboxylic acid hydrate - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicological data | acute toxicity: rat oral LD5O:7500mg/kg mouse oral LD5O:3800mg/kg |
| application | this plastic industry is used to manufacture polyimide and TNM polymers, which have good insulation and radioactivity resistance and can resist high temperature (above 400 ℃). 1,4,5,8-naphthalenic acid can be used in dyes, pigments, resins and other intermediates. 1,4,5,8-naphthalenic acid can be used to produce reduced orange GR, reduced red GG, reduced brown B and reduced brown 5R, etc. |
| production method | using pyrene as raw material, 1,4,5,8-naphthalenic acid can be prepared by chlorination and oxidation. The product can also be formed by reacting acenaphthene with malononitrile and then oxidizing it. In addition, acenaphthene is used to heat and react with carbamoyl chloride or dimethylcarbamoyl chloride in chlorobenzene in the presence of aluminum trichloride, and 5, 6-acenaphthenaphthenicarboxylic acid is generated after hydrolysis by sodium ammonia oxide solution. Then, the oxidation reaction can also produce 1,4,5, 8-naphthalenedic acid. |
Last Update：2024-04-10 22:29:15
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View History
1,4,5,8-naphthalenetetracarboxylic acid hydrate
2-Methyl-5-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyriMidine
1,3,3,5-Pentanetetracarboxylicacid, 1,3,3,5-tetraethyl ester
ethyl 2-morpholino-6-phenyl-4-(trifluoromethyl)-4H-1,3,5-oxadiazine-4-carboxylate
2-Methyl-5-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyriMidine
1,3,3,5-Pentanetetracarboxylicacid, 1,3,3,5-tetraethyl ester
ethyl 2-morpholino-6-phenyl-4-(trifluoromethyl)-4H-1,3,5-oxadiazine-4-carboxylate
Raw Materials for 1,4,5,8-naphthalenetetracarboxylic acid hydrate