Speciality Chemicals

Product Details:

Phenol detached crystals, with a purity of 99.5% AR/ACS, are a high-purity form of phenol, a crystalline organic compound with the chemical formula C6H5OH. These crystals are typically colorless to faintly pink or yellowish, and are known for their characteristic odor. They are used in various applications, including pharmaceuticals, plastics, agrochemicals, and as antiseptics and disinfectants. Key Characteristics:

• Purity: 99.5% AR/ACS (Analytical Reagent/American Chemical Society grade), indicating a high level of purity suitable for analytical and research purposes.
• Appearance: Colorless to faintly pink or yellowish crystals.
• Form: Crystalline or crystalline hygroscopic masses, which can be deliquescent (absorb moisture from the air).
• Odor: Characteristic phenol odor.
• Solubility: Soluble in water, ethanol, glycerol, and methylene chloride.
• Melting Point: Typically between 40.5°C and 43°C.
• CAS Number: 108-95-2.
• Molecular Weight: 94.11 g/mol. 

Additional Information:

• Delivery Time: Ready Stock
• Packaging Details: Box

Product Details:

HiMedia's Tryptophan Medium is a microbiological culture medium used for the detection of indole production by bacteria. It contains the amino acid tryptophan, which certain bacteria, like Escherichia coli and Vibrio parahaemolyticus, break down into indole. The presence of indole is then detected by adding Kovacs' reagent, which produces a red ring when positive. Different versions of Tryptophan Medium are available, including Tryptophan HiVeg™ Medium (using vegetable peptones) and Saline Tryptone / Tryptophan Medium, which adheres to specific ISO standards. Key Features and Uses

• Indole Production Test:The primary purpose is to test for the ability of microorganisms to produce indole from the amino acid tryptophan. 
• Bacterial Differentiation:It aids in the differentiation of bacteria, such as identifying E. coli O157:H7, a key step in coliform differentiation. 
• Kovacs' Reagent:Indole production is identified by adding Kovacs' reagent to the culture, resulting in a red ring upon a positive reaction. 
• Variety of Formulations:
  • Tryptophan HiVeg™ Medium: A version that replaces animal peptones with vegetable-defined peptones to eliminate risks from BSE/TSE/GMOs. 
  • Saline Tryptone / Tryptophan Medium: This medium follows ISO 8914:1990 standards and is used for detecting indole production by Vibrio parahaemolyticus. 
  • DEV Tryptophan Broth: Specifically recommended for the subcultivation of coliforms and indole testing in water bacteriology, following German regulations. 

How it Works

1. Bacteria capable of indole production are incubated in the medium. 
2. These bacteria enzymatically break down tryptophan into indole and other products. 
3. Kovacs' reagent is added, which reacts with the indole to form a red-colored ring at the surface of the broth. 
4. The formation of the red ring indicates a positive test for indole production. 

Additional Information:

• Item Code: M1339
• Delivery Time: Ready Stock
• Packaging Details: Box

Product Details:

Qualigens' Iso Octane ExcelaR is a clear, colorless liquid with a <10 Hazen unit color and gasoline-like odor, meeting its quality specifications. As a component of gasoline, Iso Octane ExcelaR is a high-energy, non-polar organic solvent with applications in spectroscopy and chromatography, and it is recognized for its high octane rating. It is a brand formerly associated with Thermo Fisher Scientific and is now transitioned to their Thermo Scientific brand. Description and Properties 

• Appearance: A clear, colorless liquid.
• Odor: A gasoline-like odor.
• Color: Not more than 10 Hazen units.
• Composition: It is the chemical Isooctane, also known as 2,2,4-trimethylpentane.
• Purity: The product meets quality standards, indicated by a "Complies" result in the Certificate of Analysis.

Key Uses and Applications

• High-Quality Fuel Component:Used as a component for premium-grade gasoline due to its high energy content and antiknock quality. 
• Solvent in Various Analyses:Utilized as a solvent in spectrophotometry, chromatography (such as HPLC), and for trace pesticide and herbicide residue analysis. 
• Organic Solvent:Functions as a general-purpose solvent, thinner, and cleaner in chemical laboratory settings. 

Brand and Transition 

• Brand:Qualigens is a brand of laboratory chemicals formerly sold by Thermo Fisher Scientific.
• Transition:Products previously under the Qualigens brand have transitioned to the Thermo Scientific brand, with no change in product color or performance.

Safety Information

• Flammability: Isooctane is a highly flammable liquid and vapor. 
• Health Hazards: It is toxic, can cause skin and eye irritation, and may lead to respiratory irritation. Prolonged exposure could damage organs. 
• Environmental Hazards: It is toxic to aquatic life with long-lasting effects. 

Additional Information:

• Item Code: Q12707
• Delivery Time: Ready Stock
• Packaging Details: Box