DILAURYLTHIOPROPIONATE
Dilauryl thiodipropionate
CAS: 123-28-4;115628-90-5;53571-83-8
Molecular Formula: C30H58O4S
DILAURYLTHIOPROPIONATE - Names and Identifiers
DILAURYLTHIOPROPIONATE - Physico-chemical Properties
| Molecular Formula | C30H58O4S |
| Molar Mass | 514.84 |
| Density | 0.915g/mLat 25°C(lit.) |
| Melting Point | 40-42°C(lit.) |
| Boling Point | 570.34°C (rough estimate) |
| Flash Point | >230°F |
| Solubility | Chloroform (Slightly), Isopropanol (Slightly, Heated) |
| Vapor Presure | 0.2 mm Hg ( 163 °C) |
| Appearance | White crystalline powder |
| Specific Gravity | 0.916 |
| Color | White to Off-White |
| Storage Condition | 2-8°C |
| Refractive Index | 1.5220 (estimate) |
| MDL | MFCD00026589 |
| Physical and Chemical Properties | White flocculated crystalline solid. |
| Use | As an auxiliary antioxidant, it is widely used in polypropylene, polyethylene and ABS resin, and can also be used in rubber processing lubricating grease |
DILAURYLTHIOPROPIONATE - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| WGK Germany | 1 |
| RTECS | UF8000000 |
| HS Code | 2930909165 |
DILAURYLTHIOPROPIONATE - Upstream Downstream Industry
DILAURYLTHIOPROPIONATE - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| traits | white powder or scales. Soluble in benzene, toluene, etc., slightly soluble in ethanol. No pollution, no coloring, low volatility, low thermal processing loss. Density 0.915, melting point 40-42°C, flash point> 110°C antioxidant DLTP is non-toxic, non-flammable, non-corrosive, non-irritating and has good storage stability. Melting point 38.5~41.5 ℃ content ≥ 99.0 volatile matter ≤ 0.5 solubility 10g dissolved in 100g solution, clear transmittance 425nm ≥ 97(10g/100 ml toluene) 500nm ≥ 97 at room temperature. |
| properties | density 0.915, melting point 39~40 ℃. Soluble in benzene, toluene, acetone, gasoline and other solvents. It has the effect of decomposing peroxide. It can be used as an auxiliary antioxidant for polyethylene, polypropylene, ABS resin, polyvinyl chloride, etc. It has the characteristics of no pollution, no coloring and no decomposition during high temperature processing. |
| use | fat soluble antioxidant. my country's "Hygienic Standards for the Use of Food Additives" (GB2760― 1996) stipulates that dilauryl thiodipropionate can be used for edible oils, fruits and vegetables preservation, and fatty foods, and its maximum use is 0.2 g/kg (in terms of fat content). Other reference for use: used for fresh-keeping soaking solution of fruits and vegetables, the use limit is 0.2g/L; For antioxidant of animals and vegetable oils, the use limit is 0.2g/L. This product is used as a fat-soluble antioxidant and can be used in animals and vegetable oils. It is not as effective as propyl gallate, butyl hydroxyanisole, and dibutyl hydroxytoluene when used alone. It should be used in combination with other fat-soluble antioxidants. The representative varieties of organic disulfide auxiliary antioxidants include dilauryl dipropionate (DLTP) and distearyl thiopropionate (DSTP). It has the function of decomposing hydroperoxides. As a polyolefin auxiliary antioxidant, it has the characteristics of no pollution, no coloring, and synergistic effect with phenolic antioxidants. Low toxicity can be used for food packaging and agriculture, usually in an amount of 0.05~1.5 parts. As an antioxidant, it can be used as an antioxidant for fatty foods and edible oils and as a preservative for fruits and vegetables. The maximum dosage is 0.2 g/kg. As an auxiliary antioxidant, it is widely used in polypropylene, polyethylene and ABS resins, and can also be used in rubber processing lubricating grease It can be widely used in polyethylene, polypropylene, ABS, PBT and other synthetic materials, and can also be used in rubber processing and lubricating grease |
| identification test | solubility insoluble in water; Soluble in ethanol and ether. Measured according to OT-42 method. Freezing point ≥ 40 ℃. Measured by conventional methods. The saponification value was determined by OT-40 method. |
| content analysis | take 0.700g of sample, transfer it into a 250ml conical flask, add 100ml of acetic acid and 50ml of ethanol, and carefully heat until the sample is completely dissolved. Add 3ml of hydrochloric acid and 4 drops of ethoxy coleidine test solution (TS-98), and immediately titrate with 0.1mol/L bromide-bromate test solution (TS-45). To reach the end point (pink), add 4 drops of the above indicator solution and continue titration until it changes from red to light yellow. At the same time, blank test is carried out and necessary correction is made. 0.1mol/L bromide bromate test solution per ml is equivalent to 25.74mg of dilauryl thiodipropionate (C60H58O4S). Subtract the thiodipropionic acid content measured in the following "acidity" to obtain the C30H58O4S percentage content. |
| toxicity | Adl 0~3 mg/kg(FAO/WHO,2001). GRAS(FDA,§ 182.3280,2000). LD5015g/kg (mouse, oral). |
| usage limit | FAO/WHO(1984): general edible oil 200 mg/kg. FDA,§ 182.3280(2000): Edible oils and fats (including volatile oils) ≤ 0.02% (total antioxidant content). GB 2760-1996: 0.2 g/kg for edible oils, fruits and vegetables preservation and fatty foods. |
| Preparation method | Made by esterification of thiodipropionic acid and lauryl alcohol. |
| production method | acrylonitrile route acrylonitrile is condensed with sodium sulfide aqueous solution at 20 'E:± 2 ℃, the reaction product is washed with water, separated, and then hydrolyzed with 55% sulfuric acid to obtain thiodipropionic acid; the thiodipropionic acid obtained by precipitation and separation is dissolved in water, and under the action of sulfuric acid, it is esterified with lauryl alcohol under reduced pressure, the reaction product is dissolved by acetone, neutralized by sodium carbonate, pressure filtration, crystallization, filtration, and drying to obtain the finished product. Each ton of products consumes 700kg of acrylonitrile, 900kg of 57% sodium sulfide, 700kg of concentrated sulfuric acid and 1100kg of lauryl alcohol. 2CH2 = CHCN + Na2S → S(CH = CHCOONa)2[H2SO4] → S(CH = CHCOOH)2S(CH = CHCOOH)2 + 2C12H25OH → S(CH = CHCOOC12H25)2 + 2H2O acrylic acid route drops a certain amount of acrylic acid into Na2S aqueous solution containing NaOH at 50 ℃, controls the dropping acceleration to make the temperature lower than 75 ℃, and heats to boiling after dropping, reflux 1.5h. After the solution is slightly cooled, add 50% sulfuric acid to Ph = 1, precipitate thiodipropionic acid after cooling, and filter to obtain crude product with a melting point of 26 ℃. Add quantitative lauryl alcohol to the above products, slowly heat under vacuum until thiodipropionic acid is completely dissolved, the reaction end temperature is 110 ℃, the vacuum degree is greater than 0.097MPa, and then add water to the mixture to precipitate the product; Wash with sodium carbonate solution and water to neutral, and dry in vacuum to obtain the finished product with a melting point of 39~40 ℃. 2CH2 = CHCOOH + Na2S → S(CH = CHCOONa)2[H2SO4] → S(CH = CHCOOH)2S(CH = CHCOOH)2 + 2C12H25OH → S(CH = CHCOOC12H25)2 + 2H2O is obtained by esterification of thiodipropionic acid and lauryl alcohol. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:52:54
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Raw Materials for DILAURYLTHIOPROPIONATE