1,3,5-Trioxan
s-Trioxane
CAS: 110-88-3
Molecular Formula: C3H6O3
1,3,5-Trioxan - Names and Identifiers
| Name | s-Trioxane |
| Synonyms | aldeform Trioxane marvosan s-trixane triformol s-Trioxan formagene TRIFORMOL s-Trioxane sym-trioxane 1,3,5-Trioxan 1,3,5-TRIOXANE 1,3,5-Trioxane 1,2,3-trioxane TRIOXYMETHYLENE Trioxymethylene METAFORMALDEHYDE Metaformaldehyde PARA FORMALDEHYDE 1,3,5-trioxane (sym.) 1,3,5-TRIOXACYCLOHEXANE 1,3,5-Trioxacyclohexane Formaldehyde trimer~s-Trioxan |
| CAS | 110-88-3 |
| EINECS | 203-812-5 |
| InChI | InChI=1/C3H6O3/c1-2-4-6-5-3-1/h1-3H2 |
| InChIKey | BGJSXRVXTHVRSN-UHFFFAOYSA-N |
1,3,5-Trioxan - Physico-chemical Properties
| Molecular Formula | C3H6O3 |
| Molar Mass | 90.08 |
| Density | 1.17 |
| Melting Point | 59-62°C(lit.) |
| Boling Point | 112-115°C |
| Flash Point | 113°F |
| Water Solubility | 221 g/L (25 ºC) |
| Solubility | 221g/l |
| Vapor Presure | 7.5 hPa (20 °C) |
| Appearance | Crystals or Crystalline Flakes |
| Color | Colorless to white |
| Merck | 14,9734 |
| BRN | 102769 |
| Storage Condition | Store below +30°C. |
| Explosive Limit | 3.6-28.7%(V) |
| Refractive Index | 1.4168 (estimate) |
| Physical and Chemical Properties | Density 1.17 melting point 61-62°C sublimation point 115°C boiling point 114-116°C flash point 45°C water-soluble 221g/L (25°C) |
| Use | Used as engineering plastic polyoxymethylene and other chemical intermediates, and used as disinfectants |
1,3,5-Trioxan - Risk and Safety
| Risk Codes | R11 - Highly Flammable R37 - Irritating to the respiratory system R63 - Possible risk of harm to the unborn child |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. S46 - If swallowed, seek medical advice immediately and show this container or label. |
| UN IDs | UN 1325 4.1/PG 2 |
| WGK Germany | 1 |
| RTECS | YK0350000 |
| TSCA | Yes |
| HS Code | 2912 50 00 |
| Hazard Class | 4.1 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 8190 mg/kg LD50 dermal Rabbit > 3980 mg/kg |
1,3,5-Trioxan - Upstream Downstream Industry
| Downstream Products | Acetochlor Carboprost methylate |
1,3,5-Trioxan - Nature
Open Data Verified Data
polyoxymethylene is a milky-white opaque crystalline linear polymer. It has good comprehensive properties and coloring.
Last Update：2024-01-02 23:10:35
1,3,5-Trioxan - Preparation Method
Open Data Verified Data
there are gaseous formaldehyde route and trioxymethylene route in industry. At present, our country generally uses trioxymethylene as the main monomer, or a small amount of comonomer such as dioxane polymerization. That is to say, there are two methods of homo-polymerization and copolymerization, and our country now uses copolymerization as the main method. The preparation of trioxymethylene is to concentrate 37% ~ 40% of industrial formaldehyde to 60% ~ 70%, in the presence of a catalyst (such as concentrated sulfuric acid), at 100 C synthesis of trioxymethylene, and then after crystallization, azeotropic fractionation gave anhydrous trioxymethylene monomer.
- homopolymerization method with boron trifluoride ether complex as catalyst, at 55~60 ℃ to polymerize trioxymethylene to obtain solid powder polyoxymethylene, and then after boiling, washing, after drying, the esterification reaction is carried out at 150~170 ℃ with acetic anhydride vapor in the esterification kettle, and the ester group is used to replace the hydroxyl groups at both ends of the polymer molecular chain to improve its thermal stability, UV absorbers and other additives, by extrusion granulation products.
- copolymerization method is divided into two kinds of solvent method and bulk method. (1) solvent method: using gasoline, petroleum ether or cyclohexane as solvent, the trioxymethylene and dioxane (the amount of 2% to 5% of trioxymethylene) are placed in the reaction kettle, and the temperature is raised to about 65 ° C, the catalyst is added, the reaction is controlled to be stable at about 60 ℃, and the reaction is carried out for 1-2H, and then the residual catalyst and unstable polymer end groups are destroyed by ammonia water method, high alcohol method or melting method, the white powder product is obtained; (2) bulk method: the trioxymethylene, dioxane (the amount of 2% ~ 5% of trioxymethylene) and the catalyst, through the plate-frame reactor or twin-screw reactor, the solid polymer was obtained by polymerization at 55-60 °c. The product of bulk polymerization still needs post-treatment, but it does not need a large amount of solvent, the production process is simple and the operation is convenient, especially the use of twin-screw reactor is the future development direction.
glass fiber reinforced polyoxymethylene is basically the same as glass fiber reinforced polycarbonate.
Last Update：2022-01-01 11:09:46
1,3,5-Trioxan - Use
Open Data Verified Data
polyoxymethylene is an ideal engineering plastic that can partially replace metal materials such as copper, cast zinc, steel, aluminum and so on, and has a wide range of uses. Its main application fields are agricultural machinery, automobile, electrical and electronic equipment, instrumentation, construction, light industry, etc. A large number of parts used to withstand cyclic loads such as gears, impellers, bearings, bushings, washers, rods, rails, etc. The spray gun used as a pesticide sprayer has long service life and good effect, can save thousands of tons of brass every year and is welcomed by farmers. The high-speed bearing cage used in the spinning machine is better than that made of copper; used in the automotive industry to manufacture planetary semi-shaft gasket, leaf spring bushing, tie rod, universal shaft, vaporizer, ball bowl, door lock, heater controller, odometer gear, wiper pivot bearing, etc, in the electrical industry, the production of video cassette recorder chassis components, metal plate embedded products, tape reel, telephone dial device, pocket recorder components, fan motor bracket, TV high-frequency head pre-set gear, direct-drive motor bearings; Production of small taps in buildings; Production of resin zipper, packaging garment fastener, clock gear, reeling machine frame, hose connector in light industry and other industries, gas meters, printer number wheels, various parts of the kitchen and cleaning equipment, camera reel, skis, skating shoes, fishing gear, etc.
Last Update：2024-03-20 21:30:05
1,3,5-Trioxan - Safety
Open Data Verified Data
resin production raw materials, the skin and mucous membranes of the human body have different degrees of stimulation, can cause skin allergic reactions and inflammation; At the same time also pay attention to the harm of resin dust on the human body, long-term inhalation of high concentrations of resin dust, can cause lung lesions. Most of the resin has a common hazard characteristics: open flame, high temperature flammable, and oxidant exposure to cause combustion risk. Therefore, the operator should improve the operating environment, the operation area and the non-operation area are consciously divided, as far as possible automation, sealing, installation of ventilation facilities and so on. It is packed with a kraft paper bag lined with a polyethylene bag and a polypropylene woven bag, or with a Kraft/polypropylene woven composite bag lined with a polyethylene bag. 25kg net weight per bag. Polyoxymethylene itself is non-toxic, but it will emit irritating gas at high temperature. Therefore, high temperature should be avoided during storage and transportation, and rain and mechanical damage to packaging should be avoided.
Last Update：2022-01-01 11:09:47
1,3,5-Trioxan - Molding Process
Open Data Verified Data
can be used in general thermoplastic molding methods, such as injection molding, extrusion, blow molding, spraying, etc., can also be processed and welded. Before processing should be 80~90 deg C drying 4H. Lower cylinder temperature and shorter heating time should be used when processing. In order to improve the fluidity of the material, it is often used to increase the injection pressure, improve the injection speed, improve the mold temperature and improve the mold structure to solve. Injection molding process conditions: barrel temperature 160~180 ℃, injection pressure 60 ~ 130MPa, Mold temperature 80~120 ℃. Product post-treatment conditions: 120~140 ℃ oil bath or air bath to maintain 0. 5 ~ lh.
Last Update：2022-01-01 11:09:46
1,3,5-Trioxan - Reference Information
| sublimation point | 115°C |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | trioxymethylene is a white crystalline polymer of formaldehyde, commonly used as a dry pulp agent in dry pulp surgery. When the water, the release of formaldehyde, it is sealed in the aseptic necrosis of the root pulp section, can make the root pulp drying. High concentration of trioxymethylene can cause tissue necrosis, so it can also be used as a dental pulp inactivation agent, and the inactivation time is 10~14 days. It can be used as a fungicide for seed treatment of barley and Wild Oats, and as a fungicide for seedling raising and transplanting. |
| Use | It is used as an intermediate for Engineering Plastics, polyoxymethylene and other chemicals, and used as disinfectants, such as used as engineering plastics polyoxymethylene and other chemicals intermediates, and used as disinfectants, such as organic synthesis. Intermediates for disinfectants and other chemicals. Engineering Plastics-polyoxymethylene and other chemical intermediates. |
| production method | a 60% aqueous solution of formaldehyde containing 2%-5% sulfuric acid was continuously distilled, the residue was extracted with benzene and then distilled. Tetra-formaldehyde can also be formed under certain conditions. Tetra-formaldehyde has a melting point of 112 °c and a boiling point of 175 °c. Three paraformaldehyde and four paraformaldehyde in the role of acid, can be re-decomposed into formaldehyde, formaldehyde is a special form of commodities. |
| category | relatively flammable solid |
| explosive hazard characteristics | mixture with oxidant, open flame explosion |
| flammability hazard characteristics | in case of open flame, high temperature, flammable oxidant; In case of strong acid, toxic formaldehyde gas generated by heat |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| extinguishing agent | water, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| spontaneous combustion temperature | 777 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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