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 |
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. |
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 |
Raw Materials | Formaldehyde |
Downstream Products | Dimethoxymethane Piperonyl butoxide Glyphosate Propisochlor Acetochlor |
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.
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.
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.
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.