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Nonadecanoic acid methyl ester
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Nonadecanoic acid methyl ester
Supplier:
Adipogen
Description:
It is known that phenol and p-cresol are promoters of skin tumors and also urinary excretion of phenol and p-cresol is increased by exposure to benzene, which has hemopoietic toxicity, and toluene, respectively. Therefore, the determination of phenol and p-cresol is important in clinical chemistry and toxicology. Because phenol and p-cresol are present in urine as sulfate or glucuronide conjugates, they are hydrolyzed enzymatically or with acid, followed by distillation or extraction with organic solvent prior to measurement by GC or HPLC. However, these GC and HPLC methods require relatively large sample volumes (more than 1 ml) because of their insufficient sensitivities for measuring small amounts of phenol and p-cresol. In the general, the application of fluorescent labeling techniques to HPLC result in a sensitive and selective method. Some acyl chlorides are known to react with phenolic hydroxy group to form esters. It is known that 4-(N-phthalimidinyl)benzensulfonyl chloride Phisyl-Cl7, having sulfonyl chloride, reacted with phenol to give the corresponding highly fluorescent sulfonyl ester. The sensitivity of Physil-Cl was compared with Dansyl-Cl and DPS-Cl, which are analogous to Physil-Cl as fluorescent labeling reagents having sulfonyl chloride group. The labeling reaction of phenol with Dansyl-Cl and DPS-Cl were carried out according to the method of Ruiter et al.5 and the peaks were detected at the each fluorescence maxima wavelength (Ex350nm a Em550nm for Dansyl-Cl, and Ex320nm a Em386nm for DPS-Cl). Peak height of Phisyl derivative was higher about 85-and 7,3-fold than thosse of Dansyl derivative and DPS derivative, respectively. Among these three reagents, Phisyl-Cl was the most sensitive.
Catalog Number:
(TCD0089-100G)
Supplier:
TCI America
Description:
CAS Number: 80-08-0
MDL Number: MFCD00007887 Molecular Formula: C12H12N2O2S Molecular Weight: 248.30 Purity/Analysis Method: >97.0% (T) Form: Crystal Melting point (°C): 177
Supplier:
MilliporeSigma
Description:
4, 4'-Diaminodiphenyl sulfone for synthesis, Cas Number: 80-08-0, Synonyms: DDS, 4, 4'-Sulfonyldianiline, Bis(p-aminophenyl) sulfone, Chemical formula: [4-(NH2)C6H4]2SO2, 5g.
Supplier:
APOLLO SCIENTIFIC
Description:
(Difluoromethyl)trimethylsilane 98%
Supplier:
AMBEED, INC
Description:
Ethyl 3-(Difluoromethyl)-1-methylpyrazole-4-carboxylate 97%
Supplier:
Matrix Scientific
Description:
Matrix Scientific Part Number: 034761-5G , MDL Number: MFCD06657985
Supplier:
APOLLO SCIENTIFIC
Description:
2-(Difluoromethyl)benzonitrile
Supplier:
AOB CHEM USA
Description:
2-(Difluoromethyl)-4-methoxybenzaldehyde ≥97%
Supplier:
AOB CHEM USA
Description:
3,5-Dichloro-4-(difluoromethyl)pyridine ≥97%
Supplier:
AOB CHEM USA
Description:
4-Chloro-3-(difluoromethyl)-2-fluorobenzoic acid ≥97%
Catalog Number:
(AAH66297-03)
Supplier:
Thermo Scientific Chemicals
Description:
5-Bromo-2-(difluoromethyl)pyridine, 95%
Supplier:
APOLLO SCIENTIFIC
Description:
3-(Difluoromethyl)benzonitrile
Supplier:
AMBEED, INC
Description:
5-Bromo-2-(difluoromethyl)pyridine, Purity: 95%, CAS Number: 845827-13-6, Appearance: Form: solid, Storage: Keep in dark place, Inert atmosphere, 2-8C, Size: 250MG
Supplier:
AOB CHEM USA
Description:
(2-(Difluoromethyl)-4-methoxyphenyl)boronic acid 97
Supplier:
AMBEED, INC
Description:
5-(Difluoromethyl)pyridin-3-amine 95%
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is still displayed and you need assistance, please call us at 1-800-932-5000.
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