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Formic acid safety information

Views: 2     Author: Site Editor     Publish Time: 2022-08-17      Origin: Site

Formic acid safety information

Formic acid is an organic substance, with chemical formula of HCOOH, molecular weight of 46.03, commonly known as formic acid, and is the simplest carboxylic acid. It is a colorless and pungent liquid. Formic acid is a weak electrolyte, but it is weak acidic and corrosive in aqueous solution and can stimulate skin blistering. It is usually found in the secretion of bees, certain ants and caterpillars. It is an organic chemical raw material and also used as a disinfectant and antiseptic.  

Brief history of formic acid research

Formic acid was first produced by J- 50. Gai lysac was prepared by decomposing oxalic acid. From 1855 to 1856, M Sodium formate was directly prepared from sodium hydroxide and carbon monoxide by bertelow Goldschmidt first prepared formic acid from sodium formate by hydrolysis. This method was used in industrial production in Europe in 1896, and it is still used in small batch production. In 1980, American scientific design company, Bethlehem Steel Company and Leonard company successfully developed the method of methanol carbonylation to produce formic acid, and a plant with an annual output of 20000 tons of formic acid has been put into production. In addition, formic acid can also be recovered from the by-product of light oil oxidation to acetic acid.

Physical and chemical properties of formic acid

Safety instructionsCAS 64 18 6 suppliers - YuanfarChemicals

S23: do not inhale steam.

S26: in case of contact with eyes, immediately rinse with plenty of water and send to the doctor for treatment.

S45: in case of accident or discomfort, immediately go to the doctor for help (preferably take the product container label).

S36 / 37 / 39: wear appropriate protective clothing, gloves and eye / face protection.

Hazard category code

R35: cause severe burns.

Toxicological data of formic acid

1. Acute toxicity

LD50: 1100 mg / kg (rat oral)

LC50: 15000 mg / m3 (rat inhalation, 15 min)

2. Irritant

Rabbit percutaneous: 610 mg, mild irritation (open irritation test).

Rabbit eyes: 122 mg, severe irritation.

3. Subacute and chronic toxicity

The drinking water of mice contains 0.01% ~ 0.25% free formic acid, which has no effect in 2-4 months. 0.5% will affect the appetite and slow its growth. The mice died 1-4 days after inhalation of more than 10 g / m3.

4. Mutagenicity

Microbial mutagenicity: E. coli 70 ppm (3 h).

Sister chromatid exchange: human lymphocytes 10 mmol / L.

Cytogenetic analysis: hamster ovary 10 mmol / L.

Formic acid storage and transportation

Storage method:

Store in a cool and ventilated warehouse. Keep away from kindling and heat source. The storage temperature shall not exceed 30 ℃, and the relative humidity shall not exceed 85%. Keep container sealed. It shall be stored separately from oxidant, alkali and active metal powder, and mixed storage is prohibited. Fire fighting equipment of corresponding variety and quantity shall be provided. The storage area shall be equipped with leakage emergency treatment equipment and appropriate storage materials.

Transportation method

During railway transportation, the dangerous goods shall be assembled in strict accordance with the dangerous goods assembly table in the dangerous goods transportation rules of the Ministry of railways. The package shall be complete and the loading shall be stable. During transportation, ensure that the container does not leak, collapse, fall or damage. It is strictly prohibited to mix and transport with oxidant, alkali, active metal powder, edible chemicals, etc. During transportation, the transport vehicles shall be equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment. During transportation, it shall be protected from sunshine, rain and high temperature. During road transportation, it is required to drive along the specified route and not stay in residential areas and densely populated areas.

Formic acid executive standard

GB / T 2093-2011 formic acid for industrial use

Formic acid content: use phenolphthalein as indicator and titrate with sodium hydroxide solution.

Chloride: in the nitric acid acidic solution, the chloride ion in the sample and silver nitrate form silver chloride, which is turbid with the standard turbidimetric solution.

Sulfate: sodium carbonate is added to the sample to generate sulfate from sulfate in formic acid. Barium chloride solution is added in the presence of hydrochloric acid to generate barium sulfate, which is turbid with standard turbidimetric solution.  

Iron (Fe2 +): according to GB / T 3049-2006.

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