Paraldehyde
Paraldehyde
CAS: 123-63-7
Molecular Formula: C6H12O3
Paraldehyde - Names and Identifiers
| Name | Paraldehyde |
| Synonyms | PCHO PARAL ALDEHYDE FEMA 2003 ALDEFRESH elaldehyde Paraldehyde ALDEHYDE C2 ETHYL ALDEHYDE Paracetaldehyde ACETIC ALDEHYDE paraacetaldehyde ACETALDEHYDE TRIMER acetaldehyde, trimer 2H-pyran-6-carbaldehyde trimethyl 1,3,5-trioxane 2,4,6-trimethyl-s-trioxane s-trimethyltrioxymethylene 2,4,6-TRIMETHYL-1,3,5-TRIOXANE 2,4,6-trimethyl-1,3,5-Trioxane |
| CAS | 123-63-7 |
| EINECS | 204-639-8 |
| InChI | InChI=1/C6H6O2/c7-5-6-3-1-2-4-8-6/h1-3,5H,4H2 |
| InChIKey | SQYNKIJPMDEDEG-UHFFFAOYSA-N |
Paraldehyde - Physico-chemical Properties
| Molecular Formula | C6H12O3 |
| Molar Mass | 132.16 |
| Density | 0.994 g/mL at 20 °C (lit.) |
| Melting Point | 12 °C |
| Boling Point | 65-82°C |
| Flash Point | 30°F |
| Water Solubility | 125 g/L (25 ºC) |
| Solubility | 120g/l |
| Vapor Presure | 25.89 psi ( 55 °C) |
| Vapor Density | 1.52 (vs air) |
| Appearance | solution |
| Specific Gravity | 0.994 |
| Color | Colorless liquid |
| Odor | disagreeable taste, aromatic odor |
| Merck | 13,7098 |
| BRN | 80142 |
| pKa | 16(at 25℃) |
| Storage Condition | 2-8°C |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, mineral acids. |
| Explosive Limit | 1.3-17.0%(V) |
| Refractive Index | n20/D 1.39 |
| Physical and Chemical Properties | A colorless, flavored liquid that is a polymer of the three-molecule acetaldehyde. melting point 12 .5 ℃ boiling point 128 ℃ relative density 0.994 refractive index 1.405 solubility slightly soluble in hot water, miscible with alcohol and ether. |
| Use | For the pharmaceutical industry, Organic synthesis |
Paraldehyde - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | R11 - Highly Flammable R10 - Flammable |
| Safety Description | S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S29 - Do not empty into drains. S33 - Take precautionary measures against static discharges. |
| UN IDs | UN 1993 3/PG 2 |
| WGK Germany | 1 |
| RTECS | YK0525000 |
| HS Code | 29125000 |
| Hazard Class | 3.2 |
| Packing Group | III |
| Toxicity | LD50 orally in rats: 1.65 g/kg (Figot) |
Paraldehyde - Upstream Downstream Industry
| Raw Materials | Acetaldehyde |
Paraldehyde - Reference Information
| FEMA | 4010 | PARALDEHYDE |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | used in pharmaceutical industry, organic synthesis, etc. Triacetaldehyde is easily decomposed into acetaldehyde, it can be used as a stable form of acetaldehyde to facilitate the storage and transportation of acetaldehyde. About 50% of triacetaldehyde is used in the field of pesticides in Japan, followed by solvents and diluents for Xiangke, medicine and coatings. used as a solvent for determining molecular weight, also used in medicine and organic synthesis used as a solvent, and used in organic synthesis, rubber accelerator and antioxidant manufacturing applications: pesticides, spices, pharmaceuticals, solvents and diluents for coatings, rubber accelerators and antioxidant manufacturing, etc. |
| production method | acetaldehyde can be polymerized during storage to form triacetaldehyde, tetramethylacetaldehyde, etc. In industrial production, inorganic acid such as sulfuric acid is used as catalyst to polymerize acetaldehyde. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 1530 mg/kg; Oral-mouse LD50: 2750 mg/kg |
| stimulation data | Skin-rabbit 500 mg mild; Eye-rabbit 5 mg severe |
| explosive hazard characteristics | explosive when mixed with air |
| flammability hazard characteristics | flammable in case of open flame, high temperature and oxidant; high heat can produce stimulating gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from the oxidant |
| extinguishing agent | dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| spontaneous combustion temperature | 235°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:49:11
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Raw Materials for Paraldehyde