2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)-
Mucochloric acid
CAS: 87-56-9
Molecular Formula: C4H2Cl2O3
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Names and Identifiers
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Physico-chemical Properties
| Molecular Formula | C4H2Cl2O3 |
| Molar Mass | 168.96 |
| Density | 1.85 |
| Melting Point | 125-128°C(lit.) |
| Boling Point | 238.75°C (rough estimate) |
| Flash Point | 212°F |
| Water Solubility | SOLUBLE IN HOT WATER |
| Solubility | 27g/l |
| Vapor Presure | 0.00186mmHg at 25°C |
| Appearance | Crystalline Powder |
| Color | White to light beige |
| Merck | 14,6297 |
| BRN | 1705641 |
| pKa | 0.28±0.44(Predicted) |
| PH | 2.4 (27g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.4730 (estimate) |
| Physical and Chemical Properties | Pure furochloric acid is a white monoclinic rhombic Crystal, m. P. 127 °c, f. P. 100 ℃, soluble in hot water, ethanol, ether and hot benzene, have a stimulating effect on the skin, micro-soluble in cold water, easy deliquescence. |
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Risk and Safety
| Risk Codes | R25 - Toxic if swallowed R34 - Causes burns R37 - Irritating to the respiratory system R42/43 - May cause sensitization by inhalation and skin contact. |
| 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.) S22 - Do not breathe dust. |
| UN IDs | UN 2923 8/PG 3 |
| WGK Germany | 2 |
| RTECS | AS7700000 |
| TSCA | Yes |
| HS Code | 29183000 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | LD50 in rats: 0.5-1.0 g/kg orally; 10-25 mg/kg i.p., Fassett in Industrial Hygiene and Toxicology vol. II, F. A. Patty, Ed. (Interscience, New York, 2nd ed., 1962) p 1977 |
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Nature
Open Data Verified Data
white or yellowish crystalline powder. Melting point 125~127 ℃, flash point 100 ℃, total acidity 95% ~ 102%. Slightly soluble in cold water, soluble in boiling water, ethanol, ether and hot benzene. Stable in air, but easy to deliquescence.
Last Update：2024-01-02 23:10:35
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Preparation Method
Open Data Verified Data
1. Furfural oxidation chlorination furfural in strong acidic solution into the chlorine gas oxidation and chlorination.
2. Manganese dioxide-hydrochloric acid oxidation and chlorination in the presence of hydrochloric acid, furfural and manganese dioxide are oxidized at low temperature, and then increased temperature for chlorination.
Last Update：2022-01-01 10:31:28
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Use
Open Data Verified Data
for the synthesis of broad-spectrum and high efficiency of new acaricide pyridone, herbicide benzene, but also for the synthesis of medicine berbamine pyridine and other photosensitive materials.
Last Update：2022-01-01 10:31:27
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Safety
Open Data Verified Data
This product has a stimulating effect on the skin and eyes. The oral LD50 of rats was 500-lOOOmg/kg. Outer woven bag and inner plastic bag. Avoid sun exposure.
Last Update：2022-01-01 10:31:28
2-Butenoic acid, 2,3-dichlor-4-oxo-, (Z)- - Reference Information
| surface tension | 72.58mN/m at 998g/L and 21 ℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | furfural chloric acid, also known as dichlorobutenoic acid and mucchloric acid, is used as an intermediate in the synthesis of the acaricide pyridaben in pesticides, it can also be used as an intermediate in organic synthesis for the synthesis of sulfadiazine and other drugs. intermediates in organic synthesis. For the synthesis of broad-spectrum and high-efficiency new acaricide pyridone, herbicide benaxone, also used in medicine such as sulfadiazine and photosensitive materials synthesis. is the main raw material for the synthesis of pesticides, and is also the intermediate of sulfadiazine drugs pesticide intermediate; Miticide intermediate |
| production method | 1. Furfural oxidation and chlorination furfural is obtained by passing chlorine gas into strongly acidic solution for oxidation and chlorination. 2. Oxidation and chlorination of manganese dioxide-hydrochloric acid in the presence of hydrochloric acid, furfural and manganese dioxide are oxidized at low temperature and then chlorinated at elevated temperature. furfural chlorate is prepared from furfural and chlorine. A mixture of furfural and concentrated hydrochloric acid (molar ratio 1: 3) was continuously chlorinated with chlorine at 90 to 100 ° C. In a cascade reactor consisting of three columns in series. Furfural is supplied to the first column at a rate of 142G/h, mixed with the waste liquid after the separation of furfural chlorate, and then treated with chlorine gas to enter the second column, it was mixed with furfural fed at a rate of 1276G/h. The reaction mixture was then allowed to flow into the third column while passing chlorine gas from the bottom of the column at a rate of 5250G/h and the unreacted chlorine gas was returned to the first column. The retention times of the reaction mixture in the first, second and third columns were 20min, 20min and 30min, respectively, and the molar ratio of chlorine to furfural was 5:1. The chlorinated product was cooled to 0-5 °c, I .e., furfural chlorate was obtained at a rate of 2190G/h, m. P. 125-127 °c, and the synthesis yield was 87%. |
| category | corrosive article |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 100 mg/kg; Oral-mouse LD50: 84 mg/kg |
| stimulation data | Skin-rabbits 20 mg/24 h moderate; eye-rabbit 0.05 mg/24 h severe |
| flammability hazard characteristics | flammable; Toxic chloride fumes from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidants and alkalis. |
| extinguishing agent | Sand, foam, carbon dioxide |
| Occupational Standard | SEL 0.1 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 15:16:53
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