BENZENE SULFONIC ACID TECHNICAL GRADE
Benzenesulfonic acid
CAS: 98-11-3
Molecular Formula: C6H6O3S
BENZENE SULFONIC ACID TECHNICAL GRADE - Names and Identifiers
| Name | Benzenesulfonic acid |
| Synonyms | BL70 17-120a benzenesulfonate BENZOLSULFONSAEURE Benzenesulfonic acid Benzenesulphonic acid Benzene sulfonic acid benzenesulfonic acid hydrate BENZENE SULFONIC ACID TECHNICAL GRADE |
| CAS | 98-11-3 |
| EINECS | 202-638-7 |
| InChI | InChI=1/C6H6O3S.H2O/c7-10(8,9)6-4-2-1-3-5-6;/h1-5H,(H,7,8,9);1H2 |
| InChIKey | SRSXLGNVWSONIS-UHFFFAOYSA-N |
BENZENE SULFONIC ACID TECHNICAL GRADE - Physico-chemical Properties
| Molecular Formula | C6H6O3S |
| Molar Mass | 158.18 |
| Density | 1.32 |
| Melting Point | 30-60 °C |
| Boling Point | 137℃ |
| Flash Point | >230°F |
| Water Solubility | soluble |
| Solubility | H2O: soluble0.1g/10 mL, clear, colorless |
| Vapor Presure | 69.8Pa at 20℃ |
| Appearance | Brown crystal |
| Color | Yellow to light brown |
| Merck | 14,1070 |
| BRN | 742513 |
| pKa | 0.7(at 25℃) |
| PH | 2 (H2O, 20℃)(saturated solution) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents, bases, many organic compounds. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.5151 (estimate) |
| MDL | MFCD00011689 |
| Physical and Chemical Properties | Characteristics colorless needle-like or leaf-like crystal. melting point 50~51 ℃ boiling point 137 ℃ solubility: soluble in water and ethanol, insoluble in ether and carbon disulfide, slightly soluble in benzene. |
| Use | Mainly used for alkali fusion of phenol, also used for the preparation of resorcinol, etc., in the esterification and dehydration reaction is often used as a catalyst |
BENZENE SULFONIC ACID TECHNICAL GRADE - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R22 - Harmful if swallowed R34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36 - Wear suitable protective clothing. |
| UN IDs | UN 2583 8/PG 2 |
| WGK Germany | 1 |
| RTECS | DB4200000 |
| TSCA | Yes |
| HS Code | 29041000 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 1175 mg/kg |
BENZENE SULFONIC ACID TECHNICAL GRADE - Nature
Open Data Verified Data
colorless needle-like or leaf-like crystals. Very soluble in water and ethanol, insoluble in ether and carbon disulfide, benzene-soluble. The melting point of the anhydrous substance is 50 to 51 ° C., and the melting point of the crystal water containing 1.5 molecules is 43 to 44 ° C. Boiling Point 137 °c.
Last Update：2024-01-02 23:10:35
BENZENE SULFONIC ACID TECHNICAL GRADE - Preparation Method
Open Data Verified Data
with benzene as raw material, with concentrated sulfuric acid or fuming sulfuric acid for sulfonation, followed by neutralization, acidification and. The unreacted benzene vapor and the generated water vapor are condensed and separated, then neutralized by alkali, dehydrated by salt and recycled. Benzenesulfonic acid containing benzene is refined by debenzenation in vacuum.
Last Update：2022-01-01 10:55:20
BENZENE SULFONIC ACID TECHNICAL GRADE - Introduction
Easy to absorb moisture. Soluble in water and ethanol, slightly soluble in benzene, insoluble in ether and carbon disulfide. It is an oxidant. Low toxicity, half lethal dose (rat, oral) 890mg/kg. It is irritating to skin, eyes and mucous membranes.
Last Update：2022-10-16 17:30:27
BENZENE SULFONIC ACID TECHNICAL GRADE - Use
Open Data Verified Data
A raw material for organic synthesis, which is used to produce phenol and resorcinol as well as catalysts.
Last Update：2022-01-01 10:55:20
BENZENE SULFONIC ACID TECHNICAL GRADE - Safety
Open Data Verified Data
- has a stimulating effect on the skin, eyes and respiratory tract. Its sodium salt is non-toxic. Protective gear should be worn during operation. Rat oral LD50 890mg/kg, cat skin LD50 10 mg/kg.
- This product is mostly for self-use and rarely sold. Generally packed in plastic barrels, tightly closed, stored in sunscreen, moisture-proof, well-ventilated place.
Last Update：2022-01-01 10:55:20
BENZENE SULFONIC ACID TECHNICAL GRADE - Reference Information
| LogP | 0.41 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | benzenesulfonic acid is a colorless needle-like or leaf-like crystal, highly soluble in water and ethanol, insoluble in ether and carbon disulfide, slightly soluble in benzene. Strong acid, acid and sulfuric acid, but no oxidation, dissociation constant K = 0.2(25 degrees C). Sulfonic acid group of benzene sulfonic acid can be substituted by a variety of groups, and sodium hydroxide alkali fusion to generate phenol sodium; Reaction with sodium cyanide to generate benzonitrile; Reaction with bromine to generate bromobenzene; Reaction with nitric acid to generate nitrobenzene; co-heating with water to remove sulfonic acid groups. Benzenesulfonic acid can be obtained by sulfonation of benzene in the presence of concentrated sulfuric acid. It is used to prepare phenol and resorcinol, and also used as a catalyst in esterification and dehydration reactions. |
| Application | benzene sulfonic acid is commonly used as catalyst and water-absorbing agent in esterification reaction and dehydration reaction, and its advantage is that it is weaker than sulfuric acid in oxidation, can reduce side effects. It is mainly used for the alkali fusion of phenol, also used for the preparation of resorcinol, etc., in the esterification and dehydration reaction is often used as a catalyst. benzenesulfonic acid used in oilfield water injection can relieve the formation blockage and improve the formation permeability. As the acid of acidizing water injection wells, benzenesulfonic acid is characterized by slow reaction with carbonate, and the higher the concentration, the slower the reaction rate, and the far-reaching acidizing formation, compared with hydrochloric acid, it (and mixed aryl sulfonic acid) has a long period of validity, small corrosion, safe use. Benzenesulfonic acid is also used as a catalyst for esterification and dehydration reactions and as a curing agent for the foundry industry. |
| production method | benzene is used as raw material, which is obtained by sulfonation of sulfuric acid. Add 93% sulfuric acid 2400L into the sulfonated Pan, feed benzene to the evaporator at a flow rate of 2500-3000L/h, and pass through evaporation and superheating to superheated benzene vapor with a temperature above 150 ℃, the reaction was carried out in a sulfuric acid layer by means of a bubbler at a temperature of about 170 ° C. And the free acid was finally controlled at 4-5%. After about 10 hours, the reaction is completed, the unreacted benzene vapor and the generated water vapor are condensed and separated, and the acidic benzene is neutralized by liquid alkali, and the salt is dehydrated and recycled. Benzene-containing benzenesulfonic acid was used to remove residual benzene in a vacuum benzene remover. The sulfonation yield was 96.5%. Benzene sulfonic acid with sodium sulfite or sodium hydroxide neutralization, benzene sulfonic acid sodium. The neutralization yield was 99%. Raw material consumption quota: benzene 600kg/t, fuming sulfuric acid 750kg/t. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 980 mg/kg; Oral-wild birds LD50: 75 mg/kg |
| stimulation data | Skin-rabbits 2 mg/24 h severe; eye-rabbit 0.25 mg/24 h severe |
| flammability hazard characteristics | flammability; Toxic sulfur oxide fumes from combustion |
| storage and transportation characteristics | ventilation and low temperature drying; Separate storage |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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