Dimethoxymethane, (Formaldehyde dimethyl acetal)
Dimethoxymethane
CAS: 109-87-5
Molecular Formula: C3H8O2
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Names and Identifiers
| Name | Dimethoxymethane |
| Synonyms | Formal Methylal Anesthenyl (CH3O)2CH2 DIMETHYLFORMAL DIMETHOXYMETHANE Dimethoxymethane dimethoxy-methan 2,4-Dioxapentane bis(methoxy)methane formaldehyde dime. acetal Dimethylacetal formaldehyde Formaldehyde dimethyl acetal~Methylal Dimethoxymethane, (Formaldehyde dimethyl acetal) |
| CAS | 109-87-5 |
| EINECS | 203-714-2 |
| InChI | InChI=1/C3H8O2/c1-4-3-5-2/h3H2,1-2H3 |
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Physico-chemical Properties
| Molecular Formula | C3H8O2 |
| Molar Mass | 76.09 |
| Density | 0.860g/mLat 20°C(lit.) |
| Melting Point | -105 °C |
| Boling Point | 41-43°C |
| Flash Point | -18 °C |
| Water Solubility | 32.3 g/100 mL (16 ºC) |
| Solubility | 32.3 g/100 mL (16°C) |
| Vapor Presure | 6.38 psi ( 20 °C) |
| Vapor Density | 2.6 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless |
| Odor | Mild, ethereal; chloroform-like. |
| Exposure Limit | NIOSH REL: TWA 1,000 ppm (3,100 mg/m3), IDLH 2,200 ppm; OSHA PEL:TWA 1,000 ppm; ACGIH TLV: TWA 1,000 ppm (adopted). |
| Merck | 14,6012 |
| BRN | 1697025 |
| pKa | 3.1[at 20 ℃] |
| PH | pH (12.5vol % , 25℃) : 4.5～6.6 |
| Storage Condition | Store at |
| Stability | Stable. Extremely flammable. Readily forms explosive mixtures with air. Note low flash point and wide explosive limits. Incompatible with strong oxidizing agents, strong acids. May form explosive pero |
| Sensitive | Moisture Sensitive |
| Explosive Limit | 1.6-17.6%(V) |
| Refractive Index | n20/D 1.354 |
| Physical and Chemical Properties | Colorless, clear, volatile and flammable liquid with chloroform odor and irritation. melting point -104.8 ℃ boiling point 44 ℃ relative density 0.8560 refractive index 1.3513 flash point -17.8 ℃ solubility in 3 times water [Solubility in water at 20 °c 32% by weight]. Miscible with most organic solvents. |
| Use | For the production of cation exchange resins and solvents |
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Risk and Safety
| Risk Codes | R11 - Highly Flammable R19 - May form explosive peroxides R36 - Irritating to the eyes R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S33 - Take precautionary measures against static discharges. S7/9 - S37/39 - Wear suitable gloves and eye/face protection |
| UN IDs | UN 1234 3/PG 2 |
| WGK Germany | 1 |
| RTECS | PA8750000 |
| FLUKA BRAND F CODES | 21 |
| TSCA | Yes |
| HS Code | 2911 00 00 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 6653 mg/kg |
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Upstream Downstream Industry
| Raw Materials | Glycine Paraformaldehyde Methyl alcohol |
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Nature
Open Data Verified Data
a colorless, clear, volatile, flammable liquid with chloroform odor and irritation. Melting point 104.8 °c. The relative density was 0. 8560. The boiling point of 44 deg C, flash point of 17.8 deg C. Spontaneous ignition point 237.2. Refractive index (nDo) 3513. Dissolved in 3 times of water [20 ° C water solubility 32% (mass)]. Miscible with most organic solvents.
Last Update：2024-01-02 23:10:35
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Preparation Method
Open Data Verified Data
methanol and formaldehyde were synthesized in a synthetic tower using concentrated sulfuric acid as a catalyst, and the fraction controlled at the top temperature of 41. 5-42 ℃ was formaldehyde.
Last Update：2022-01-01 10:16:38
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Use
Open Data Verified Data
mainly used in the production of anion exchange resin, also used as a solvent and special fuel. It is also used in the manufacture of perfumes, the production of artificial resins, as a reaction medium for Grignard reactions and rapamycin (synthesis) reactions.
Last Update：2022-01-01 10:16:39
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Safety
Open Data Verified Data
- It has little toxicity, but it can cause lung and kidney disorders. At high concentrations there is an anesthetic effect. LC in rats is about 15000 × 10 -6, and the maximum allowable concentration in workplace air is 310 mg/m3. Production equipment should be closed. The operator should wear protective gear.
- It is packed in plastic barrels with a net weight of 20kg per barrel. Store in a cool, dry, ventilated place, away from fire, heat, sun, moisture. According to the provisions of flammable chemicals storage and transportation.
Last Update：2022-01-01 10:16:40
Dimethoxymethane, (Formaldehyde dimethyl acetal) - Reference Information
| Henry's Law Constant | (x 10-4 atm?m3/mol):1.73 at 25 °C (Hine and Mookerjee, 1975) |
| LogP | 0 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | mainly used in the production of anion exchange resin, also as a solvent and special fuel. Its solubility is stronger than that of ether and acetone, and methanol and azeotropic mixture can dissolve nitrocellulose with high nitrogen content. However, because of its strong anesthetic vapor, it is not suitable for use as a general solvent, usually as a special acoustic solvent. It is also used in the manufacture of perfumes, the production of artificial resins, as a reaction medium for Grignard reactions and rapamycin (synthesis) reactions. used in the production of cation exchange resins and solvents, etc. used as solvents, Analytical reagents dissolution characteristics, miscible with alcohol ether acetone, etc., can dissolve most resins, dissolution capacity is strong. It is a good substitute for halogenated hydrocarbons and DMF. It dissolves 32.3% in water at 16 degrees and can therefore be used in the development of aqueous coatings and adhesives. Application: it has been widely used in aerosol, coating, synthetic leather, automobile glazing agent, leather glazing agent, UV glazing agent, polishing oil, film-coated adhesive, Universal Adhesive, spray glue, air freshener and Tenna water. |
| production method | methanol and formaldehyde were reacted in the synthesis column under the catalysis of concentrated sulfuric acid. The resultant methylal is distilled out from the tower where the temperature is controlled at 41.5-42 ° C., and unreacted methanol is separated from the product for recycling to obtain methylal with a content of 85% or more. 37% of methanol and of formaldehyde are consumed per ton of product. The impurities in the product methylal are mainly methanol and formaldehyde. When higher purity is required, formaldehyde can be removed by oxidation with alkaline hydrogen peroxide, and methanol can be removed by distillation with sodium metal. |
| category | flammable liquid |
| toxicity grade | low toxicity |
| Acute toxicity | inhalation-rat LC50: 47g/m3; Inhalation-mouse LC50: 57g/m3/7 h |
| stimulation data | eye-rabbit 0.1 ml moderate |
| explosive hazard characteristics | mixture with air to form explosive mixture |
| flammability hazard characteristics | ; Spicy and irritating smoke released from fire scene |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from oxidants and acids |
| extinguishing agent | dry powder, foam, carbon dioxide, 1211 |
| Occupational Standard | TLV-TWA 3100 mg/m3; Tel 3900 mg/m3 |
| spontaneous combustion temperature | 459 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentrations | 2,200 ppm [10% LEL] |
Last Update：2024-04-09 02:00:04
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Raw Materials for Dimethoxymethane, (Formaldehyde dimethyl acetal)