Methyl stearate - CAS 112-61-8
Catalog number: 112-61-8
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Molecular Formula:
C19H38O2
COA:
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Chemical Family:
Other Natural Compounds
Purity:
>98%
Appearance:
Powder
Synonyms:
Methyl n-octadecanoate; Stearic acid methyl ester; methyl octadecanoate; Me-ST
MSDS:
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Quality Standard:
Enterprise Standard
Quantity:
Milligrams-Grams
1.Evaluating the potential for recycling all PET bottles into new food packaging.
Begley TH;McNeal TP;Biles JE;Paquette KE Food Addit Contam. 2002;19 Suppl:135-43.
To evaluate the feasibility of recycling all PET bottles into food packaging, realistic estimates of the maximum concentration of contaminants that might be expected in the polymer are needed. To estimate the maximum concentration of a contaminant that might be in PET from the storage of non-food substances, sorption experiments into two types of PET were performed. These test materials were 0.8mm thick amorphous PET (a relative sink for contaminants) and commercial PET bottle wall. Using a commercial shampoo containing 1% lindane (C6H6Cl6), the test materials were stored in contact with the shampoo at 20 and 40 degrees C for 231 days. This commercial shampoo also represents an extreme case because it contains 7% acetone, a solvent which swells PET, further enhancing sorption of chemicals. Additional sorption experiments into PET were performed by preparing solutions of 10% toluene in Miglyol (a fractionated coconut oil), 10% benzophenone in Miglyol, 5% 2-butoxyethoxy ethanol (2-BE) in 50/50 water/ethanol, and 10% methyl stearate in heptane.
2.[Chemical constituents of Trichosanthes kirilowii peels].
Li AF;Sun AL;Liu RM;Zhang YQ Zhong Yao Cai. 2014 Mar;37(3):428-31.
OBJECTIVE: ;To study the chemical constituents of the peels of Trichosanthes kirilowii.;METHODS: ;Many chromatographic techniques were used including repeated silica column chromatography, polyamide resin and semi-preparative high performance liquid chromatography. According to the physical and chemical properties and spectral analysis, the chemical structures of the compounds were determined.;RESULTS: ;Thirteen compounds were isolated and identified as quercetin-3-O-[alpha-L-rhamnose(1 --> 2)-beta-D-glucopyranosyl]-5-O-beta-D-glucopyranoside (1), quercetin-3-O-rutinoside (2), apigenin-7-O-beta-D-glucopyranoside (3), diosmetin-7-O-beta-D-glucopyranoside (4), luteolin (5), apigenin (6), diosmetin (7), methyl palmitate (8), methyl stearate (9), palmitic acid (10), beta-sitosterol (11), alpha-spin-asterol (12) and stigmasterol (13).;CONCLUSION: ;Compounds 1 - 3, 5 - 7 are isolated from this plant for the first time.
3.Simple diagnosis of the Zellweger syndrome by gas-liquid chromatography of dimethylacetals.
Björkhem I;Sisfontes L;Boström B;Kase BF;Blomstrand R J Lipid Res. 1986 Jul;27(7):786-91.
The absence of peroxisomes in patients with the cerebrohepatorenal syndrome of Zellweger leads to several biochemical abnormalities, including deficient synthesis of plasmalogens as well as accumulation of very long-chain fatty acids and intermediates in bile acid biosynthesis. Accumulation of very long-chain fatty acids in serum and fibroblasts has hitherto been used most extensively for diagnosis. Due to the relatively small amounts of the very long-chain fatty acids also in the Zellweger patients, and the risk for interfering impurities, such analyses are difficult. Direct assay of plasmalogens is also relatively difficult and time-consuming. In this report, we describe a relatively simple method for diagnosis, based on gas-liquid chromatography of a lipid extract of erythrocytes after methyl transesterification. The alpha, beta-unsaturated ether in the plasmalogen is converted to the dimethylacetal of the corresponding aldehyde, and the relative amount of plasmalogen is thus reflected by the ratio between 18:0 dimethylacetal and methyl stearate as well as by the ratio between 16:0 dimethylacetal and methyl palmitate.
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CAS 112-61-8 Methyl stearate

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