29685
1,5-Naphthalenedisulfonic Acid
CAS: 81-04-9
Molecular Formula: C10H8O6S2
29685 - Names and Identifiers
| Name | 1,5-Naphthalenedisulfonic Acid |
| Synonyms | 29685 1,5-disulfonic acid Naphthalin-1,5-disulfonsure 1,5-phthalenedisulfonic acid 5-Naphthalenedisulfonic acid 1,5-Naphthalenedisulfonic Acid naphthalene-1,5-disulfonic acid naphthalene-1,5-disulphonic acid Naphthalene-1,5-disulfonic acid tetrahydrate NAPHTHALENE-1,5-DISULFONIC ACID DISODIUM SALT |
| CAS | 81-04-9 |
| EINECS | 216-732-0 |
| InChI | InChI=1/C10H8O6S2/c11-17(12,13)9-5-1-3-7-8(9)4-2-6-10(7)18(14,15)16/h1-6H,(H,11,12,13)(H,14,15,16) |
29685 - Physico-chemical Properties
| Molecular Formula | C10H8O6S2 |
| Molar Mass | 288.3 |
| Density | 1.7040 |
| Melting Point | 242.5°C (rough estimate) |
| Boling Point | 400.53°C (rough estimate) |
| Water Solubility | 90.52g/L at 25℃ |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | White powder |
| Color | Crystals or plates |
| pKa | -0.60±0.40(Predicted) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.5630 (estimate) |
| Physical and Chemical Properties | White flaky crystals (with four molecules of crystal water). Melting point 240-245 °c (anhydrous). Soluble in water and ethanol, insoluble in ether. |
| Use | Used as raw materials for organic synthesis and dye intermediates |
29685 - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 2585 |
| WGK Germany | 1 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | LD50 orl-rat: 30 g/kg GISAAA 45(3),73,80 |
29685 - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Naphthalene |
29685 - Reference Information
| LogP | -0.94 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | as an intermediate for dyes. For the manufacture of 1, 5-dihydroxynaphthalene, amino C acid and other intermediates. used as raw material and dye intermediate in organic synthesis used in dye synthesis |
| production method | is obtained by sulfonation of naphthalene. About 20% fuming sulfuric acid was added into the sulfonated pan, and of fine fine naphthalene powder was slowly added within 1.5H under stirring, and the temperature was controlled at 25-30 ° C., followed by stirring for half an hour. The temperature was raised to 40 ° C., and the temperature was maintained for 1H. The reaction was until the material was completely soluble. Cooling to 20 deg C below, in 10h First slowly then quickly add 1700-1720kg 20% sulfuric acid, the temperature is still controlled at 25-30 deg C. After addition, stir for 4H. The reaction was taken up in 20% sodium chloride, cooled and filtered. The filter cake was dissolved in hot water, adjusted to Neutral with sodium hydroxide solution, filtered and dried to give 1,5-naphthalene disulfonic acid. |
| category | toxic substances |
| toxicity grade | low toxicity |
| Acute toxicity | oral-rat LD50: 30000 mg/kg; Oral-mouse LD50: 47 mg/kg |
| flammability hazard characteristics | flammability; Toxic sulfur oxide fumes from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
Last Update：2024-04-10 22:29:15
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View History
29685
77995
17875-18-2
Choline Base Aqueous
2-Ethylhexyl palmitate
ammoniumhydrofluoride
amprolene
Sulphur Blue 7
77995
17875-18-2
Choline Base Aqueous
2-Ethylhexyl palmitate
ammoniumhydrofluoride
amprolene
Sulphur Blue 7
Raw Materials for 29685