Dimethyl phthalate
Dimethyl phthalate
CAS: 131-11-3
Molecular Formula: C10H10O4
Dimethyl phthalate - Names and Identifiers
| Name | Dimethyl phthalate |
| Synonyms | DMP D.M.P Avolin ai3-00262 Dimethyl phthalate 1,2-dimethyl phthalate Phthalic acid dimethyl ester Dimethyl 1,2-benzenedicarboxylate Dimethyl 1,2-benzenedicarboxylate acid 1,2-benzendicarboxylicacid,dimethylester 1,2-benzenedicarboxylic acid dimethyl ester Benzene-1,2-dicarboxylic acid dimethyl ester |
| CAS | 131-11-3 |
| EINECS | 205-011-6 |
| InChI | InChI=1/C10H10O4/c1-13-9(11)7-5-3-4-6-8(7)10(12)14-2/h3-6H,1-2H3 |
| InChIKey | NIQCNGHVCWTJSM-UHFFFAOYSA-N |
Dimethyl phthalate - Physico-chemical Properties
| Molecular Formula | C10H10O4 |
| Molar Mass | 194.18 |
| Density | 1.19 g/mL at 25 °C (lit.) |
| Melting Point | 2 °C (lit.) |
| Boling Point | 282 °C (lit.) |
| Flash Point | 295°F |
| Solubility | 4.0g/l |
| Vapor Presure | 0.008 hPa (20 °C) |
| Appearance | Colorless oily liquid |
| Specific Gravity | 1.194 (20/4℃) |
| Color | Clear |
| Exposure Limit | TLV-TWA air 5 mg/m3 (ACGIH, MSHA,and OSHA). |
| Merck | 14,3255 |
| BRN | 1911460 |
| PH | 7 (H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents, strong acids, strong bases, nitrates. Sensitive to prolonged exposure to light. |
| Sensitive | Easily absorbing moisture |
| Refractive Index | n20/D 1.515(lit.) |
| MDL | MFCD00008425 |
| Physical and Chemical Properties | colorless, transparent and yellowish oily liquid with slightly aromatic taste |
| Use | Used as gas chromatography stationary liquid;
This product is a variety of resins have a strong dissolution of plasticizers, with a variety of cellulose resin, rubber, vinyl resin compatibility, good film-forming, adhesion and water resistance. It is often used in combination with diethyl phthalate in the production of cellulose acetate film, varnish, transparent paper and molding powder. A small amount is used in the preparation of nitrocellulose. It can also be used as a plasticizer for nitrile rubber. This product can also be used as a solvent for mosquito repellent oil (crude oil), polyvinyl fluoride coating, methyl ethyl ketone peroxide and DDT |
Dimethyl phthalate - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R52 - Harmful to aquatic organisms |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 - Wear suitable protective clothing and gloves. S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. |
| UN IDs | UN 3082 |
| WGK Germany | 1 |
| RTECS | TI1575000 |
| TSCA | Yes |
| HS Code | 2917 34 00 |
| Toxicity | LD50 in mice, rats, guinea pigs (ml/kg): 7.2, 6.9, 2.4 orally (Draize) |
Dimethyl phthalate - Upstream Downstream Industry
| Raw Materials | Phthalic anhydride Methyl alcohol Phthalic acid |
| Downstream Products | 1,3,3-trimethyl-2-methyleneindoline cyclohexanone peroxide Methyl ethyl ketone peroxide |
Dimethyl phthalate - Reference
| Reference Show more | 1. [IF=7.963] Ming Li et al."Sensitive and selective determination of butyl benzyl phthalate from environmental samples using an enzyme immunoassay."Sci Total Environ. 2019 Oct;687:849 2. [IF=1.986] Simin Cheng et al."Fast screening of prohibited chemicals in plastic toys using ambient ionization mass spectrometry."Int J Mass Spectrom. 2019 Oct;444:116176 |
Dimethyl phthalate - Nature
Open Data Verified Data
colorless transparent oily liquid, slightly aromatic. The relative density was 1. 192. Melting point o ~ 2. Boiling Point 282 °c. Flash point 151 °c. Ignition point 154 °c. Refractive index 5155. Viscosity (20 deg C) 22mPa.s. Vapor pressure (25 °c) 1.33 PA. With ethanol, ether miscible, soluble in benzene, acetone and other organic solvents, insoluble in water and mineral oil.
Last Update：2025-06-10 22:55:16
Dimethyl phthalate - Preparation Method
Open Data Verified Data
with phthalic anhydride and methanol as raw materials, sulfuric acid as catalyst for direct esterification. The crude ester obtained by esterification is neutralized, washed with water, dealcoholized and distilled to obtain dimethyl phthalate as a finished product.
Last Update：2022-01-01 10:44:15
Dimethyl phthalate - Application
Open Data Verified Data
This product is a solvent, but also a plasticizer. Plasticizing ability is very strong, and a variety of cellulose resin, rubber, vinyl resin compatibility, film-forming, adhesion and good water resistance. Often used with diethyl phthalate, mainly for cellulose acetate film, varnish, cellophane and molding powder. Also used as a plasticizer for Nitrile Rubber, products with good cold resistance. This product can also be used as anti-mosquito oil ingredients and solvents.
Last Update：2025-08-19 16:24:40
Dimethyl phthalate - Safety
Open Data Verified Data
- This product has low toxicity. The oral LD50 of rats was 6.9g/kg. In addition to irritation of the mucous membrane of the human eye, but also damage to the skin or sensitization. The maximum allowable concentration in air is 5mg/m3.
- the use of galvanized iron drum packaging, storage in a cool and dry place. Thermal insulation and fire prevention. Storage and Transportation shall be in accordance with the provisions for general combustible chemicals.
Last Update：2022-01-01 10:44:15
Dimethyl phthalate - Reference Information
| relative polarity | 0.309 |
| Henry's Law Constant | At 25 °C: 235, 246, 230, 214, 168, 127, and 118 at pH values of 3.00, 3.37, 5.88, 6.18, 7.62, 8.91,and 8.99, respectively (Hakuta et al., 1977). |
| LogP | 1.54 at 25℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | dimethyl phthalate (DMP) is a plasticizer with strong dissolving power to various resins and is compatible with various cellulose resins, rubber and vinyl resins. It has good film-forming property, adhesion and water resistance. It is usually used in combination with diethyl phthalate in the production of cellulose acetate films, varnishes, transparent paper and molding powder. A small amount is used in the production of nitrocellulose. |
| mosquito repellent ester | dimethyl phthalate, also known as mosquito repellent ester and imenin, is a broad-spectrum and efficient insect repellent. It is a colorless to light yellow transparent liquid and is an effective mosquito repellent ingredient in toilet water, it has a good repellent effect on flies, lice, ants, mosquitoes, cockroaches, midges, gadflies, flat fleas, sand fleas, sand midges, sandflies, cicadas, etc.; its repellent effect is long and can be used in different climates. Its chemical properties are stable under the conditions of use, and at the same time it has high thermal stability and high sweat resistance. It has good compatibility with commonly used cosmetics and pharmaceuticals. It can be made into solutions, emulsions, ointments, coatings, jelly, aerosols, mosquito coils, microcapsules and other special repellent agents. It can also be added to other products or materials (such as toilet water) to make it both repellent. Compared with standard mosquito repellent mosquito repellent, it has the remarkable characteristics of lower toxicity, less irritation and longer repellent time. It is a replacement product of mosquito repellent. |
| toxicity | dimethyl phthalate has the advantages of non-toxic side effects, non-allergic and non-skin permeability on skin and mucous membranes. it is very safe to use. it should be noted that if people with sensitive skin excessively absorb mosquito repellent ester components, allergic reactions may occur in skin. |
| use | used as plasticizer for cellulose acetate, mosquito repellent and solvent for polyfluoroethylene coating dimethyl phthalate is an intermediate of rodenticide diphtherone, rodent and chlorrosterone, and is also an important solvent. this product is a plasticizer with strong dissolving power to various resins, and can be compatible with various cellulose resins, rubber and vinyl resins. It has good film-forming property, adhesion and water resistance. It is usually used in combination with diethyl phthalate in the production of cellulose acetate films, varnishes, transparent paper and molding powder. A small amount is used in the production of nitrocellulose. The product can also be used as a plasticizer for nitrile rubber, and the product has good cold resistance. Mixed with other plasticizers. It can overcome shortcomings such as large volatility and low temperature crystallization. The product can also be used as a solvent for mosquito repellent oil (crude oil) and DDT. The product is also used as a gas chromatography stationary liquid. when producing cellulose esters, polyvinyl acetate, resin and coupe resin, it can also be used as plasticizer. It can also be used as waterproofing agent; It is used for flotation of polymetallic ore toughening agent, high boiling point solvent, plasticizer, gas chromatography stationary liquid (maximum service temperature 122 ℃, solvent is ether), separation and analysis of hydrocarbons and esters. |
| production method | phthalic anhydride and excess (4 times) methanol are esterified at normal pressure, and excess methanol is refluxed with water to obtain DMP. 600kg phthalic anhydride, 450kg90-95 ℃ methanol and 1050ml concentrated sulfuric acid were successively put into the reaction pot and heated and refluxed for 24 hours. After the reaction, the methanol is recovered, then neutralized with sodium carbonate, washed with water, and then distilled to obtain the finished product. The purity of dimethyl phthalate, an industrial first-class product, is ≥ 99%. Raw material consumption quota: phthalic anhydride 750kg/t, methanol 445kg/t. The preparation method is to use phthalic anhydride and methanol for esterification reaction, the reaction temperature is the reflux temperature, the reaction is about ten hours, the obtained crude ester is neutralized, washed, and distilled to obtain the product. |
| category | flammable liquid |
| toxicity classification | low toxicity |
| acute toxicity | oral-rat LD50: 6800 mg/kg; Oral-mouse LD50: 6800 mg/kg |
| stimulation data | eye-rabbit 119 mg |
| flammability hazard characteristics | combustible in case of open flame, high temperature and strong oxidant; Combustion emission stimulates smoke |
| storage and transportation characteristics | complete packaging, light and light; warehouse ventilation, away from open flames, high temperature, separate storage from oxidant |
| fire extinguishing agent | foam, carbon dioxide, dry powder, sand, mist water |
| occupational standard | TLV-TWA 5 mg/m3; STEL 10 mg/m3 |
| spontaneous combustion temperature | 460°C DIN 51794 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 2,000 mg/m3 |
Last Update：2024-04-09 18:58:34
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Raw Materials for Dimethyl phthalate
Downstream Products for Dimethyl phthalate