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4-Amino-o-cresol
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4-Amino-o-cresol
Supplier:
AMBEED, INC
Description:
9,9-Bis(4-hydroxy-3-methylphenyl)fluorene 98%
Supplier:
AMBEED, INC
Description:
2-Methylanisole 99%
Supplier:
TCI America
Description:
2-Ethyl-6-methylphenol, Purity: >98.0%(GC), CAS Number: 1687-64-5, Molecular Formula: C9H12O, Molecular Weight: 136.19, Synonyms: 6-Ethyl-o-cresol, Size: 5G
Supplier:
TCI America
Description:
CAS Number: 2440-22-4
MDL Number: MFCD00022903 Molecular Formula: C13H11N3O Molecular Weight: 225.25 Purity/Analysis Method: >99.0% (HPLC,T) Form: Crystal Melting point (°C): 130 Flash Point (°C): 210
Supplier:
AMBEED, INC
Description:
4,4'-(Propane-2,2-diyl)bis(2-methylphenol), Purity: 98%, CAS Number: 79-97-0, Appearance: Form: solid, Storage: Inert atmosphere, Room Temperature, Size: 5g
Supplier:
THERMO FISHER SCIENTIFIC CHEMICALS
Description:
4-Methylanisole 99%
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:
(95020-822)
Supplier:
HiMedia
Description:
For the identification of <i>Escherichia coli</i> and coliform bacteria from water samples.
Catalog Number:
(77146-594)
Supplier:
AMBEED, INC
Description:
2-Bromo-6-methyl-4-nitrophenol, Purity: 97%, CAS Number: 4186-49-6, Appearance: Solid, Storage: Keep in dark place, Inert atmosphere, Room temperature, Size: 1g
Supplier:
TCI America
Description:
CAS Number: 89-83-8
MDL Number: MFCD00002309 Molecular Formula: C10H14O Molecular Weight: 150.22 Purity/Analysis Method: >99.0% (GC) Form: Crystal Boiling point (°C): 232 Melting point (°C): 51 Flash Point (°C): 115
Supplier:
THERMO FISHER SCIENTIFIC CHEMICALS
Description:
5-Isopropyl-2-methylphenol
Catalog Number:
(77979-623)
Supplier:
LGC STANDARDS
Description:
Carnidazole, TRC, LGC Standards
Catalog Number:
(TCT1528-025G)
Supplier:
TCI America
Description:
CAS Number: 576-55-6
MDL Number: MFCD00002148 Molecular Formula: C7H4Br4O Molecular Weight: 423.72 Purity/Analysis Method: >98.0% (GC) Form: Crystal Color: White Melting point (°C): 210
Catalog Number:
(TCB1527-025G)
Supplier:
TCI America
Description:
CAS Number: 24197-34-0
MDL Number: MFCD00142117 Molecular Formula: C14H14O2S Molecular Weight: 246.32 Purity/Analysis Method: >98.0% (GC) Form: Crystal Melting point (°C): 123
Supplier:
AOB CHEM USA
Description:
3-Hydroxy-4-methylbenzeneboronic acid ≥97%
Supplier:
TCI America
Description:
CAS Number: 79-97-0
MDL Number: MFCD00002232 Molecular Formula: C17H20O2 Molecular Weight: 256.35 Purity/Analysis Method: >98.0% (GC) Form: Crystal Melting point (°C): 139 Flash Point (°C): 210
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the
is still displayed and you need assistance, please call us at 1-800-932-5000.
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at Regulatory_Affairs@vwr.com
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