Tai'an Jia Ye Biological Technology Co.,Ltd

2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole
Ventilation low temperature drying; separate storage of benzoic acid with oxidant Benzoic acid, benzoic acid Alias: benzoic acid; benzene carboxylic acid; benzoic acid English Name: acid Benzoic Chemical formula: C7H6O2 CAS number: 65-85-0 SMILES:c1ccccc1C (=0) 0 RTECS:200-618-2 Molar mass: 122.1224 Physical properties: scale like or needle like crystals, with the smell of benzene or formaldehyde; Density: 1.2659g/cm3 Melting point: 121-123 Boiling point: 249.3 Solubility in water: 0.21g (17.5 C), 0.35g (25), 2.2g (75), 2.7g (80), 5.9G (100 C); Main use: 1, industrial use Benzoic acid and its sodium salt is available for latex, toothpaste, jam or other food antimicrobial agent, mordant dyeing and printing colours. Can also be used as an intermediate for pharmaceutical and dye, used in the preparation of plasticizer and spices, as well as anti rust agent of iron and steel equipment, agricultural chemicals. 2, chemical intermediates (1) plasticizer intermediate Benzoic acid can be used as an intermediate in the production of benzoic acid ester and benzene two formic ester, benzoic acid ester and benzene two formic acid ester is an important plasticizer. (2) adhesive intermediate Benzoic acid can be prepared by bromination of p-bromobenzoic acid, inter - bromo benzoic acid can be used as a binder for electric photographic material. 3, lubricant Sodium benzoate can be used as a lubricant in metal processing and pharmaceutical production. 4, paint After the introduction of benzoic acid alkyd resin can make the paint drying, but not like that of styrene solvent. The gloss, hardness and water resistance of the film made of modified alkyd resin have been improved. Preparation: Laboratory method for preparation of initial benzoic acid is made from gum benzoin carbonization or alkaline hydrolysis and also can be prepared by hydrolysis of hippurate for. Detection method: Method name: Determination of benzoic acid, benzoic acid, neutralization titration method Application: this method was used to determine the content of benzoic acid in the raw material of benzoic acid by titration. The method is suitable for the raw material of benzoic acid. Method: tested goods and neutral dilute ethanol (of phenolphthalein indicator solution significant neutral) dissolved, add fluid of phenolphthalein indicator, with sodium hydroxide as the titrant, and corrected the results of titration with blank test, according to the amount of use of the titrant calculated benzoic acid content. Reagent: 1 neutral dilute ethanol (to phenolphthalein liquid neutral) The sodium hydroxide titration solution (0.1mol/L) 3 phenolphthalein indicator solution The benchmark two phthalic acid potassium hydrogen Instrument and equipment: Sample preparation: 1, sodium hydroxide titration solution (0.1mol/L) Preparation: take the amount of sodium hydroxide, water shake to dissolve into a saturated solution, after cooling, the polyethylene plastic bottle, put aside for a few days, after the clarification. The clarification of the saturated solution of sodium hydroxide 5.6mL, add new boiling water to make 1000mL, shake. Calibration: take in 105 DEG C and dried to a constant weight benchmark adjacent benzene dicarboxylic acid potassium hydrogen about 0.6g, precision said, adding new boiling water 50ml, shaking the dissolve as far as possible, with phenolphthalein indicator solution 2 drops, the titrant, towards the end of the, make potassium hydrogen phthalate is completely dissolved, the solution titration to is shown in pink. Each 1mL sodium hydroxide titration solution (0.1mol/L) is equivalent to 20.42mg of two hydrogen phthalate. The concentration of the solution is calculated according to the consumption of the liquid and the amount of hydrogen and potassium in the two hydrogen phthalate. Storage: set polyethylene plastic bottle, sealed and stored; from two of the plug holes, bores are respectively inserted into the glass tube 1, 1 pipe lime and sodium is linked together, tube 1 for suck out the liquid. 2, phenolphthalein indicator solution Take 1g 100mL to add phenolphthalein, ethanol solution. Steps: precision said donor sample about 0.25g, neutral and dilute ethanol (of phenolphthalein indicator solution significant neutral) dissolved in 25ml, phenolphthalein indicator solution 3 drops, by titration with sodium hydroxide solution (0.1 mol / L) titration. Each 1mL sodium hydroxide titration solution (0.1mol/L) is equivalent to C7H6O2 of 12.21mg. Note: the \"precision\" system refers to the weight of the weight should be accurate to the weight of the 1/1000. The accuracy of the measurement system of the precision measurement should meet the requirements of the national standard. Safety measures: Benzoic acid leak emergency treatment Isolation and leakage of contaminated areas, surrounded with warning signs, cut off the fire source. Emergency handling personnel wearing a gas mask, wearing a general fire protective clothing. To be collected in a container with a cover for drying and cleaning with a clean shovel, and transported to the waste disposal site. Such as a large number of leaks, collection and recycling or disposal of waste. Benzoic acid protection measures Respiratory protection: when the concentration exceeds the standard in the air, wear a mask respirator. When emergency rescue or evacuation, it is recommended to wear self-contained breathing apparatus. Eye protection: wear chemical safety goggles. Protective clothing: wear anti acid and alkali work clothes. Hand protection: wear anti chemical gloves. Other: after work, shower and change. Pay attention to personal hygiene. Regular physical examination. Emergency treatment of benzoic acid Skin contact: remove contaminated clothing, rinse with plenty of water. Eye contact: immediately open the upper and lower eyelids, with flowing water or physiological saline flush. Medical treatment. Inhalation: quickly from the scene to the fresh air. Maintain airway patency. Respiratory difficulties to transport nitrogen. Breathing stops, immediately carry out artificial respiration. Medical treatment. Ingestion: oral intake of gargle, drink milk or egg white, doctor. Fire fighting methods: fog water, foam, carbon dioxide, dry powder, sand. Benzoic acid precautions Topical use of the product may have mild irritation. Ointment should not be stored in high temperature. Environmental hazards: the environment is harmful to the water and the atmosphere can cause pollution. Explosion hazard: This product is flammable, with