PARAFORMALDEHYDE
Paraformaldehyde
CAS: 30525-89-4
Molecular Formula: （CH2O)n
PARAFORMALDEHYDE - Names and Identifiers
| Name | Paraformaldehyde |
| Synonyms | PARAFORM POLYACETAL ACETAL RESIN POLY(TRIOXANE) P-FORMALDEHYDE polyformaldehyde POLYACETAL RESIN Paraformaldehyde PARAFORMALDEHYDE ethyl methyl ether POLY(OXYMETHYLENE), ACETATE END-CAPPED |
| CAS | 30525-89-4 |
| EINECS | 608-494-5 |
| InChI | InChI=1/C3H8O/c1-3-4-2/h3H2,1-2H3 |
| InChIKey | VHWYCFISAQVCCP-UHFFFAOYSA-N |
PARAFORMALDEHYDE - Physico-chemical Properties
| Molecular Formula | （CH2O)n |
| Molar Mass | 90.08 |
| Density | 0.88 g/mL at 25 °C (lit.) |
| Melting Point | 120-170 °C (lit.) |
| Boling Point | 107.25°C (rough estimate) |
| Flash Point | 158°F |
| Water Solubility | sparingly soluble |
| Solubility | chlorophenol above 70°C: soluble |
| Vapor Presure | <1.45 mm Hg ( 25 °C) |
| Vapor Density | 1.03 (vs air) |
| Appearance | prilled |
| Color | White to off-white |
| Odor | odor of formaldehyde |
| Merck | 14,7025 |
| BRN | 102769 |
| PH | 5.5 (H2O, 20℃)(saturated solution) |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong acids, organic acids, strong oxidizing agents, oxides, alkalies, strong bases, amines. Combustible. Dust may form an explosive mixture with air.Liberates poisonous gas |
| Explosive Limit | 7-73%(V) |
| Refractive Index | 1.4540 (estimate) |
| Physical and Chemical Properties | |
| Use | It is used as a raw material for organic chemical industry and synthetic resin, and also used as a drug fumigant. |
PARAFORMALDEHYDE - Risk and Safety
| Risk Codes | R31 - Contact with acids liberates toxic gas R43 - May cause sensitization by skin contact R40 - Limited evidence of a carcinogenic effect R36/37/38 - Irritating to eyes, respiratory system and skin. R20/22 - Harmful by inhalation and if swallowed. R41 - Risk of serious damage to eyes R37/38 - Irritating to respiratory system and skin. R42/43 - May cause sensitization by inhalation and skin contact. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable |
| Safety Description | S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24 - Avoid contact with skin. S22 - Do not breathe dust. |
| UN IDs | UN 2213 4.1/PG 3 |
| WGK Germany | 3 |
| RTECS | RV0540000 |
| TSCA | Yes |
| HS Code | 38084090 |
| Hazard Class | 4.1 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 592 mg/kg |
PARAFORMALDEHYDE - Upstream Downstream Industry
| Raw Materials | Formaldehyde |
| Downstream Products | Dimethoxymethane Piperonyl butoxide Glyphosate Propisochlor Acetochlor |
PARAFORMALDEHYDE - Nature
Open Data Verified Data
White combustible crystalline powder with formaldehyde odor. The melting point was 121-123 °c. Flash point 71.1 °c. Spontaneous ignition point 300. Slowly soluble in cold water, dissolved in hot water faster. Formaldehyde is released in aqueous solution. The solubility in water is 0. 24g/looc3h2 0 at 20 ℃. Insoluble in ethanol, ether. Soluble in caustic soda, potassium solution.
Last Update：2024-01-02 23:10:35
PARAFORMALDEHYDE - Preparation Method
Open Data Verified Data
The formaldehyde solution was evaporated under reduced pressure, condensed in the presence of a catalyst, filtered, washed with water and dried under vacuum to obtain a finished product.
Last Update：2022-01-01 10:16:43
PARAFORMALDEHYDE - Use
Open Data Verified Data
used in the preparation of synthetic resin (such as artificial angle products or artificial Ivors) and adhesives. Used in the pharmaceutical industry (the active ingredient of contraceptive cream) and Ward, clothing and bedding, etc. Disinfection, can be used as fumigation Disinfection agent, fungicide and insecticide.
Last Update：2022-01-01 10:16:43
PARAFORMALDEHYDE - Safety
Open Data Verified Data
This product dust lOOmg/m3 by the rat continuous inhalation for 9 months, the body did not occur essential changes. In case of strong acid, strong alkali or high temperature, namely decomposition of formaldehyde caused by irritation and poisoning. Site operators appeared on the upper respiratory tract and skin diseases, basically due to this product
Decomposition products caused by formaldehyde. The maximum allowable concentration in air is 5mg/m3. See formaldehyde for its Protection Measure. The use of plastic bags jacket woven bags, each bag of 50kg. According to the general provisions of the storage and transportation of chemicals.
Last Update：2022-01-01 10:16:44
PARAFORMALDEHYDE - Reference Information
| pH indicator color change ph range | 4-5.5 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | paraformaldehyde (IUPAC named Polyoxymethylene,POM) is a polymer of formaldehyde (high molecular weight polyformaldehyde), and the general structure length is eight to 100 units. Long-chain paraformaldehyde is often made of heat-resistant plastics, also known as polyformaldehyde plastics (POE, Derlin produced by DuPont). Paraformaldehyde decomposes quickly and will release slightly smelly formaldehyde. |
| application | paraformaldehyde is mainly used in the production and use of herbicides, and is also used to make synthetic resins (such as artificial horn products or artificial ivory) and adhesives. also used in pharmaceutical industry (contraceptive cream active ingredient) and pharmacy, clothes and bedding disinfection, paraformaldehyde can also be used as fumigation disinfectant, fungicide and insecticide. |
| preparation | the aqueous solution containing formaldehyde 37% is vacuum concentrated at 65 ℃ to obtain paraformaldehyde concentrated aqueous solution containing formaldehyde 80%, and a suspension is added at a concentration of 1.5%. the manufacturing method of the suspension is to disperse fine magnesium oxide powder into methanol to obtain methanol suspension with magnesium oxide concentration of 50ppm, and then add it to an extruder, the particles of 2-5mm are obtained, and the particles are added into a dryer, dried for 60 minutes to make paraformaldehyde containing solid 80%, and dried for 120 minutes to make paraformaldehyde 92%, with a yield of 400kg/hr. |
| use | used as raw material for organic chemical industry and synthetic resin, and also used as pharmaceutical fumigant paraformaldehyde is solid formaldehyde with high formaldehyde content, which is solid granular and easy to store and transport. It can become formaldehyde vapor at a higher temperature, and it is easy to replace high-concentration formaldehyde to participate in various reactions, which is beneficial to chemical synthesis and other industrial applications, especially in the synthesis that requires the use of anhydrous formaldehyde as raw materials., Has a wide range of uses. There are mainly the following aspects (1) Pesticides: synthetic acetochlor, butachlor and glyphosate, etc.;(2) Coatings: synthetic high-grade automotive paints;(3) Resin: synthetic urea-formaldehyde resin, phenolic resin, polyacetal resin, melamine resin, ion exchange resin, etc. and various adhesives: fumigation disinfectant. (7) Organic raw materials: used to prepare pentaerythritol, trimethylolpropane, glycerin, acrylic acid, methyl acrylate, methacrylic acid, N-hydroxymethacrylamide, alkyl phenol, methyl vinyl ketone, etc. (8) Other: medicine and disinfection. Used in the pharmaceutical industry and also used as a sterilant |
| production method | 37% formaldehyde is evaporated under reduced pressure, and solid formaldehyde is obtained by catalytic condensation, filtration, washing with water, and vacuum drying to obtain finished products with a content of 93-95%. 37% 3180kg of formaldehyde is consumed per ton of paraformaldehyde. |
| category | more flammable solids |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 800 mg/kg |
| stimulation data | skin-rabbit 500 mg/24 hours severe |
| flammability hazard characteristics | flammability in case of open flame, high temperature and oxidant; Combustion produces stimulating smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from oxidant |
| fire extinguishing agent | water, foam, carbon dioxide, dry sand, dry powder |
| auto-ignition temperature | 572 °F |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:04:16
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Raw Materials for PARAFORMALDEHYDE
Downstream Products for PARAFORMALDEHYDE