50-00-0
Formaldehyde
CAS: 50-00-0;8013-13-6
Molecular Formula: CH2O
50-00-0 - Names and Identifiers
50-00-0 - Physico-chemical Properties
| Molecular Formula | CH2O |
| Density | 1.083 |
| Melting Point | -15℃ |
| Boling Point | 97℃ |
| Flash Point | 60℃ |
| Water Solubility | soluble |
| Refractive Index | 1.3755 |
| Physical and Chemical Properties | colorless combustible gas, with a strong irritating, asphyxiating odor, human eyes, nose and other stimulating effects. Storage Conditions 2-8°C |
| Use | It is a strong reducing agent, has a bactericidal effect, can be used as a disinfectant for people, can be used as an antiseptic for animals, such as fumigation Used as organic chemical raw materials, used in medicine, synthetic fiber, synthetic resin, plastic preservative, reducing agent, etc Mainly used for the preparation of phenolic, urea-formaldehyde, melamine and polyoxymethylene resin, also used for the preparation of MDI, pentaerythritol, urotropine and butanediol Used for chromatographic analysis, sterilization disinfectant, also used for phenolic resin preparation and biological specimens It is a strong reducing agent, has a bactericidal effect, can be used as a disinfectant for people, can be used as an antiseptic for animals, such as fumigation |
50-00-0 - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R34 - Causes burns R40 - Limited evidence of a carcinogenic effect R43 - May cause sensitization by 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.) S51 - Use only in well ventilated areas. |
| UN IDs | UN 1198/2209 |
50-00-0 - Upstream Downstream Industry
50-00-0 - Nature
Open Data Verified Data
colorless transparent liquid. It can be freely miscible with water, ethanol and acetone. In the air can be gradually oxidized to formic acid, is a strong reducing agent. Its vapor and air to form an explosive mixture, fire, high heat caused by combustion explosion. In general commercial products, 10% to 12% of methanol is added as an inhibitor, otherwise polymerization will occur.
Last Update：2024-01-02 23:10:35
50-00-0 - Preparation Method
Open Data Verified Data
methanol vapor at 300 ° C., the introduction of copper or silver catalyst, methanol dehydrogenation obtained. Formaldehyde gas absorption water content of 36% ~ 40%, that is, formaldehyde solution. The commercially available formaldehyde solution is distilled to remove impurities and supplemented with methanol as the reagent formaldehyde solution.
Last Update：2022-01-01 09:26:19
50-00-0 - Standard
Authoritative Data Verified Data
- This product contains formaldehyde (CH20) should be 36.0% ~ 38 0% (g /g).
- This product contains 10% to 12% methanol to prevent polymerization.
Last Update：2024-01-02 23:10:35
50-00-0 - Use
Open Data Verified Data
used as a fixative for various preparations in microscopic analysis as a reagent for the determination of ammonium salts and amino acids. Also used as a germicidal disinfectant, biological specimens of dip, reducing agent. It is also an important organic raw material.
Last Update：2022-01-01 09:26:20
50-00-0 - Trait
Authoritative Data Verified Data
- This product is colorless or almost colorless clear liquid, irritating special odor, can stimulate the nose and throat mucosa; In the cold place for a long time is prone to turbidity.
- This product can be mixed with water or ethanol.
Last Update：2022-01-01 11:38:43
50-00-0 - Differential diagnosis
Authoritative Data Verified Data
- take 5 drops of this product, put it in a test tube, add water lml to dilute, add 3 drops of ammonia silver nitrate test solution, that is, the precipitation of silver, into a fine gray precipitate, or the generation of a bright silver mirror in the tube wall.
- take a small amount of this product, add a few drops of magenta sulfurous acid solution and dilute hydrochloric acid, that is red.
Last Update：2022-01-01 11:38:44
50-00-0 - Safety
Open Data Verified Data
rat oral LD50: 800mg/kg; Rabbit percutaneous LD50: 270mg/kg. It is strongly irritating to mucous membranes, upper respiratory tract, eyes and skin. Protection should be provided when they may come into contact with their vapors. Store in a cool, ventilated warehouse. Keep away from fire and heat source. Protection from direct sunlight. Keep the container sealed. Should be stored separately from the oxidant, acid, alkali.
Last Update：2022-01-01 09:26:20
50-00-0 - Exam
Authoritative Data Verified Data
acidity take 5.0 of this product, add 5ml of water and 2 drops of phenolphthalein indicator solution, and use sodium hydroxide titration solution (0.lmol/L) titration to the solution is pink, consumption of sodium hydroxide titration solution (0.lmol/L) not over 1.0.
Last Update：2022-01-01 11:38:45
50-00-0 - Content determination
Authoritative Data Verified Data
take about 1.5 of this product, precision weighing, set the Erlenmeyer flask, Add 10ml of water, 25ml of hydrogen peroxide test solution and 2 drops of bromothymol blue indicator solution, Dropwise add sodium hydroxide titration solution (lmol/L) add 25ml sodium hydroxide titration solution (1 mol/L) to the solution until the solution is blue. Set a glass funnel at the mouth of the bottle and heat it on a water bath for 15 minutes, the funnel was washed with water, 2 drops of bromothymol blue indicator solution were added, the solution was titrated with hydrochloric acid titration solution (1 mol/L) to yellow color, and the titration result was corrected by blank test. Each 1 ml of sodium hydroxide titration solution (1 mol/L) corresponds to 30.03mg of ch20.
Last Update：2022-01-01 11:38:45
50-00-0 - Category
Authoritative Data Verified Data
Disinfection antiseptic.
Last Update：2022-01-01 11:38:45
50-00-0 - Storage
Authoritative Data Verified Data
seal, anti-freeze storage.
Last Update：2022-01-01 11:38:46
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