Diphenylmethane
Diphenylmethane
CAS: 101-81-5
Molecular Formula: C13H12
Diphenylmethane - Names and Identifiers
| Name | Diphenylmethane |
| Synonyms | Ditan Benzylbenzene Diphenylmethane diphenyl-methan Methane, diphenyl- 1,1'-methylenebis-benzen 1,1'-methylenebisbenzene 1,1'-methylenebis-Benzene 1,1'-methanediyldibenzene Benzene,1,1'-methylenebis- Diphenyl Methane (101-101-5) |
| CAS | 101-81-5 |
| EINECS | 202-978-6 |
| InChI | InChI=1/C13H12/c1-3-7-12(8-4-1)11-13-9-5-2-6-10-13/h1-10H,11H2 |
Diphenylmethane - Physico-chemical Properties
| Molecular Formula | C13H12 |
| Molar Mass | 168.23 |
| Density | 1.006 g/mL at 25 °C (lit.) |
| Melting Point | 22-24 °C (lit.) |
| Boling Point | 264 °C (lit.) |
| Flash Point | >230°F |
| Water Solubility | 14.1mg/L(25 ºC) |
| Solubility | Soluble in ethanol, ether, chloroform, etc. |
| Vapor Presure | <1 mm Hg ( 77 °C) |
| Vapor Density | 5.79 (vs air) |
| Appearance | Colorless crystal |
| Specific Gravity | 1.006 |
| Color | Colorless to pale yellow |
| Merck | 14,3328 |
| BRN | 1904982 |
| pKa | 33.5(at 25℃) |
| Storage Condition | Store below +30°C. |
| Explosive Limit | 0.69-8.66%(V) |
| Refractive Index | n20/D 1.577(lit.) |
| MDL | MFCD00004781 |
| Physical and Chemical Properties | Characteristics of colorless needle-like crystal, orange flavor. melting point 25.3 ℃ boiling point 264.3 ℃ relative density 1.006 (liquid) refractive index 1.5753 solubility insoluble in water, soluble in ethanol, ether, chloroform, benzene and cyclohexane. |
| Use | Used as an intermediate in organic synthesis |
Diphenylmethane - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | 22 - Harmful if swallowed |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S58 - S54 - S44 - S29 - Do not empty into drains. |
| UN IDs | UN3077 |
| WGK Germany | 2 |
| RTECS | DA4976500 |
| TSCA | Yes |
| HS Code | 29029090 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 2250 mg/kg LD50 dermal Rabbit > 5000 mg/kg |
Diphenylmethane - Nature
Open Data Verified Data
colorless needle-like crystals with orange flavor. Melting point 25.3 °c. Boiling point 264.3 ℃,158 ℃(4. 67kPa). Relative density 1.006 (liquid). 3421 (solid). Refractive index (nDo) 5753. Insoluble in water, soluble in ethanol, ether, chloroform, benzene and cyclohexane.
Last Update：2025-06-10 22:55:16
Diphenylmethane - Preparation Method
Open Data Verified Data
by benzyl chloride and benzene in aluminum amalgam (or anhydrous aluminum chloride) catalytic effect derived. First, the dried benzene and aluminum amalgam are heated, then benzyl chloride is slowly introduced and refluxed for 2H, cooled, water is added and stirred, and the water is removed by standing, and the rest is washed with 5% alkali solution and washed with water, finally, the product was distilled under reduced pressure.
Last Update：2022-01-01 10:39:50
Diphenylmethane - Introduction
Soluble in ethanol, ether, chloroform, benzene and cyclohexane, insoluble in water, insoluble in liquid ammonia. It has aromas of geranium oil and sweet orange oil.
Last Update：2022-10-16 17:11:27
Diphenylmethane - Application
Open Data Verified Data
organic synthesis raw materials, can be used for the production of dyes, pharmaceuticals and so on.
Last Update：2025-08-19 16:24:40
Diphenylmethane - Safety
Open Data Verified Data
- oral LDL0 5000mg/kg in rats. See biphenyl for the rest.
- store in a cool and ventilated warehouse, away from fire, heat source, keep the package intact. Should be sealed and stored.
Last Update：2022-01-01 10:39:50
Diphenylmethane - Reference Information
| freezing point | 24.0 to 26.0 ℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Diphenylmethane is an aromatic hydrocarbon, this compound can be regarded as the product of the substitution of two hydrogen atoms in methane by phenyl. Diphenylmethane is the basic skeleton of many compounds in organic chemistry. It can be prepared by the Friedel-Crafts reaction of benzyl chloride and benzene under the catalysis of Lewis acid such as aluminum trichloride: C6H5CH2Cl C6H6 → (C6H5)2CH2 HCl |
| apply | white crystal or crystalline powder of dextrocamphorsulfonic acid. It can be used as a resolution agent and a catalyst for dipeptide coupling; used for the resolution of pharmaceutical intermediates or isomer products; used in the pharmaceutical industry; organic synthesis intermediates. |
| use | used for organic synthesis, and also used as a reagent for determination of mercury and a gas chromatography stationary liquid diphenylmethane has the ability to fix fragrance and can be used in a small amount in medium and low-grade daily necessities, especially in soap essence with its rose-like geranium flavor, which can be used in human roses, new grass, fragrant myrtle and various types, it is also used to prepare artificial geranium oil. It can be well mixed with dimethyl hydroquinone, coumarin, and hydroxycitronellal, and it can also be coordinated with peach, Rubus and other fruity aromas. Diphenylmethane can be used as an intermediate in organic synthesis, and the pharmaceutical industry is used to produce diphenhydramine hydrochloride. in the perfume industry, diphenylmethane can be used as a substitute for geranium oil, suitable for preparing soap essence and perfume, etc. It is also used in dye production, as well as a reagent for mercury determination and a gas chromatography stationary liquid. |
| Production method | It is obtained by the reaction of benzyl chloride and benzene under the catalysis of aluminum amalgam (or anhydrous aluminum trichloride, or zinc chloride). First, the dried benzene and aluminum amalgam are heated, then benzyl chloride is slowly introduced, refluxed for 2 hours, cooled and stirred with water, let stand to remove water, the rest is washed with 5% lye, washed with water, and finally distilled under reduced pressure to obtain the finished product. |
| auto-ignition temperature | 905 °F |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 15:16:46
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