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ステアリン酸メチル
ステアリン酸 メチル · ステアリン酸メチル · ケメスター9718 · オクタデカン酸メチル · メチル=ステアラート · ステアリ酸メチル · メチルステアレ-ト · ステアリン酸メチル [GC用標準物質]
識別子と物理属性
| CAS No. | 112-61-8 |
|---|---|
| 分子式 | C19H38O2 |
| 平均分子量 | 298.5 g/mol |
| 単同位体質量 | 298.28718046 g/mol |
| SMILES | CCCCCCCCCCCCCCCCCC(=O)OC |
| InChIKey | HPEUJPJOZXNMSJ-UHFFFAOYSA-N |
| PubChem CID | 8201 |
| ChEBI | CHEBI:69188 |
| EC No. | 203-990-4 |
| DTXSID | DTXSID2047640 |
| 現地名 | ステアリン酸メチル |
化学・物理的性質
| XLogP | 9 |
|---|---|
| 極性表面積 | 26.3 |
| 水素結合供与体数 | 0 |
| 水素結合受容体数 | 2 |
| 回転可能結合数 | 17 |
| 重原子数 | 21 |
| 形式電荷 | 0 |
| 複雑度 | 214 |
| 物質分類 | Other Classes -> Stearates |
| 脂質 | Fatty Acyls [FA] -> Fatty esters [FA07] -> Short fatty esters [FA0710] |
| 化粧品 | EmollientSkin conditioning |
| 香料 | Fragrance Ingredient (Methyl octadecanoate) -> IFRA transparency List |
| LogP（分配係数） | log Kow= 8.35 |
| 密度 | 0.8498 at 104 °F (NTP, 1992) - Less dense than waterwill float0.8498 @ 40 °C/4 °C0,84 g/cm3 |
| 香味料 | EU Flavoring substances |
| Color/Form | White crystalsSemisolid |
| 溶解度 | less than 1 mg/mL at 72 °F (NTP, 1992)Insol in watersol in alcohol or ether.Very sol in ether and chloroformChloroform (Sparingly), DMSO (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly)クロロホルムに可溶。水に不溶。 |
| 引火点 | 307 °F (NTP, 1992)307 °F (153 °C)>230 °F |
| 沸点 | 828 to 829 °F at 747 mmHg (NTP, 1992)443 °CBoiling point: 215 °C @ 15 mm Hg181.00 to 182.00 °C. @ 4.00 mm Hg |
| Decomposition | When heated to decomposition it emits acrid smoke and irritating fumes. |
| 融点 | 37-41 °C(lit.) |
| 屈折率 | 1.4241 (estimate) |
| 貯蔵条件 | -20°C |
| 外観・状態 | ペースト |
| 色 | オフホワイトからクリームまたはライトイエロー |
| 臭い | 100.00%で。油っぽいワックス状 |
| においのタイプ | ワックスっぽい |
| 由来生物 | synthetic |
| Merck | 14,8804 |
| BRN | 1786213 |
| ヘンリー定数 | 1.7×10-3 mol/(m3Pa) at 25℃, Krop and Velzen (1997) |
| 化粧品成分の機能 | スキンコンディショニング皮膚コンディショニング剤 - 保湿剤 |
| InChI | 1S/C19H38O2/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19(20)21-2/h3-18H2,1-2H3 |
| InChIKey | HPEUJPJOZXNMSJ-UHFFFAOYSA-N |
| SMILES | CCCCCCCCCCCCCCCCCC(=O)OC |
| LogP（分配係数） | 8.350 |
| CAS データベース | 112-61-8(CAS DataBase Reference) |
| EPAの化学物質情報 | Methyl stearate (112-61-8) |
化学的特性
off-white to cream or light yellow paste
安全性と法規制
| GHS 分類 | This chemical does not meet GHS hazard criteria for 99.5% (186 of 187) of all reports.Not ClassifiedAggregated GHS information provided per 187 reports by companies from 3 notifications to the ECHA C&L Inventory. |
|---|---|
| 規制情報 | Chemical: Octadecanoic acid, methyl esterCommission Regulation (EC) No 1565/2000 (Repealed by Com. Implementing Reg. (EU) No 872/2012)Octadecanoic acid, methyl ester is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Octadecanoic acid, methyl ester are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 04-12-2017 https://echa.europa.eu/registration-dossier/-/registered-dossier/21230Methyl stearate: Does not have an individual approval but may be used under an appropriate group standard |
| その他の安全情報 | IMAP assessments - Octadecanoic acid, methyl ester: Human health tier I assessment |
| 火災危険 | This chemical is combustible. (NTP, 1992) |
| 火災の可能性 | COMBUSTIBLE WHEN EXPOSED TO HEAT OR FLAME ... |
| 健康有害性 | ACUTE/CHRONIC HAZARDS: When heated to decomposition this compound emits toxic fumes. (NTP, 1992) |
| 有害性の概要 | An irritant[MSDSonline] See STEARATES. |
| 反応性グループ | Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters |
| Reactivity Profile | METHYL STEARATE is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. |
| Air and Water Reactions | Insoluble in water. |
| NFPA Hazard Classification | 0 - Materials that, under emergency conditions, would offer no hazard beyond that of ordinary combustible materials.1 - Materials that must be preheated before ignition can occur. Materials require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur.0 - Materials that in themselves are normally stable, even under fire conditions. |
| Hazard Classes and Categories | Not Classified |
| Hazardous Reactivities and Incompatibilities | ... Can react with oxidizing materials.Incompatible with nitrates. /Esters/ |
| 消火 | Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992) |
| 応急処置 | EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. |
| 消火手順 | TO FIGHT FIRE, USE CARBON DIOXIDE, DRY CHEMICAL.WATER OR FOAM MAY CAUSE FROTHING. |
| 非火災時の漏出対応 | SMALL SPILLS AND LEAKAGE: Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned. |
| 処分方法 | SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices. |
| Threshold Limit Values (TLV) | 8 hr Time Weighted Avg (TWA): 10 mg/cu m. /Stearatesdoes not include stearates of toxic metals/Excursion Limit Recommendation: Excursions in worker exposure levels may exceed 3 times the TLV-TWA for no more than a total of 30 minutes during a work day, and under no circumstances should they exceed 5 times the TLV-TWA, provided that the TLV-TWA is not exceeded. /StearatesA4Not classifiable as a human carcinogen. /Stearates |
| Personal Protective Equipment (PPE) | RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992) |
| 体内負荷 | Methyl stearate was detected in thrombogenic coronary plaque in 2 of 2 human aorta samples at 3 and 20 ppb(1). |
| 環境中動態 | TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 62,000(SRC), determined from a structure estimation method(2), indicates that methyl stearate is expected to be immobile in soil(SRC). Volatilization of methyl stearate from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.016 atm-cu m/mole(SRC), using a fragment constant estimation method(3). However, adsorption to soil is expected to attenuate volatilization(SRC). Methyl stearate is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.36X10-5 mm Hg(4). Methyl stearate is expected to rapidly biodegrade in aerobic soils as suggested by biodegradation in an aqueous biodegradation screening test(5).AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 62,000(SRC), determined from a structure estimation method(2), indicates that methyl stearate is expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.016 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Volatilization half-lives for a model river and model lake are 5 and 164 hours, respectively(SRC), using an estimation method(3). However, volatilization from water surfaces is expected to be attenuated by adsorption to suspended solids and sediment in the water column(SRC). The volatilization half-life from a model pond is estimated to be about 61 hours ignoring adsorptionwhen considering maximum adsorption the volatilization half-life increases to 17 months(5). According to a classification scheme(5), a /an estimated BCF of W29(SRC), from a log Kow of 8.35(10) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low. Methyl stearate is expected to rapidly biodegrade in aerobic waters based on screening study results(8). An estimated base-catalyzed second-order hydrolysis rate constant of 0.030 L/mole-sec(9,SRC) corresponds to half-lives of 7.3 years and 266 days at pH values of 7 and 8, respectively(9).ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), methyl stearate, which has a vapor pressure of 1.36X10-5 mm Hg at 25 °C(2), will exist in both the vapor and particulate phases in the ambient atmosphere. Vapor-phase methyl stearate is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC)the half-life for this reaction in air is estimated to be 18 hours(SRC) from its estimated rate constant of 2.1X10-11 cu cm/molecule-sec at 25 °C(3). Particulate-phase methyl stearate may be removed from the air by wet and dry deposition(SRC). |
| 食品調査値 | Methyl stearate was identified in raw beef samples, concn not provided(1). It was detected as a flavoring constituent of cassava, gari, and farine(2). Methyl stearate was identified as a volatile flavor componenent of clove essential oil(3). |
| Soil Adsorption/Mobility | Using a structure estimation method based on molecular connectivity indices(1), the Koc for methyl stearate can be estimated to be about 62,000(SRC). According to a classification scheme(2), this estimated Koc value suggests that methyl stearate is expected to be immobile in soil. |
| Natural Pollution Sources | Methyl stearate is a component of raw beef(1) and a flavoring constituent of cassava, gari, farine, and clove(2,3). |
| Atmospheric Concentrations | URBAN/SUBURBAN: Methyl stearate was qualitatively detected in ambient air particulate samples collected in Upland CA, Lake Charles, LA, Elizabeth, NJ, and Houston, TX, in 1978(1). |
| Artificial Pollution Sources | Methyl stearate's production and use as an synthetic intermediate(1) may result in its release to the environment through various waste streams(SRC). |
| Environmental Biodegradation | AEROBIC: Methyl stearate was found to partially biodegrade within 24 hours when inoculated with a mixed activated sludge in a Warburg respirator(1). A close structural analog to methyl stearate, ethyl stearate, was listed as biodegradable in the Japanese MITI test(2). |
| Sediment/Soil Concentrations | SOIL: Methyl stearate was qualitatively detected in soil samples from Southern Alberta, Canada, in strata associated with the Mazama volcano eruption which occurred approximately 7000 years ago(1). |
| Environmental Bioconcentration | An estimated BCF of 29 was calculated for methyl stearate(SRC) using a log Kow of 8.35(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low. |
| Volatilization from Water/Soil | The Henry's Law constant for methyl stearate is estimated as 0.016 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that methyl stearate is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as approximately 5 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as approximately 164 hours(SRC). The volatilization half-life from a model pond 2 m deep is estimated to be about 61 hours ignoring adsorptionwhen considering maximum adsorption the volatilization half-life increases to 17 months(3). Methyl stearate's Henry's Law constant(1) indicates that volatilization from moist soil surfaces may occur although adsorption may attenuate this process(SRC). Methyl stearate is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.36X10-5 mm Hg(4). |
| Evidence for Carcinogenicity | A4Not classifiable as a human carcinogen. /Stearatesdoes not include stearates of toxic metals/ |
| 水環境危害等級（WGK） | 1 |
| TSCA 収載状態 | TSCA listed |
| RTECS 番号 | WI4460000 |
| 税関コード | 2915 70 50 |
| 危険文句（R） | 40 |
| 化審法 | (2)-798 |
| 安全措置（S） | 22-24/25 |
| 貯蔵分類 | 11 - Combustible Solids |
| 有害物質データ | 112-61-8(Hazardous Substances Data) |
用途
用途
脂肪酸のガスクロマトグラフ分析用標準品。
使用
Methyl Stearate is used as a nonionic surfactant in various experiments in helping solubilize a variety of chemical species by dissociating aggregates and unfolding proteins.
一般的な説明
White crystals or chunky solid.