fournitures de laboratoire

Chemical Reagents O-Cresolphthalein Complexone CAS 2411-89-4 C32H32N2O12 Biological Stains Complex Indicators Acid-base Indicators Introduction: O-Cresolphthalein Complexone is a white or yellow powder, insoluble in water, soluble in dilute alkali and blue, with a pH value of 8.2-9.8 (color ranges from colorless to red); the maximum absorption peak is 566 (381) mm. Uses: Biological Stains Complex Indicators Acid-base Indicators. Product Name O-Cresolphthalein Comple CAS 2411

Chemical Reagents Neocuproine CAS 484-11-7 Copper determination Reagent Organic Synthesis Introduction: Reagent for copper determination, white or yellow brown crystals. Uses: Used as a reagent for the determination of cuprous, photometric analysis for the determination of copper, and determination of ultra-thin blood glucose; Organic synthesis. Product Name Neocuproine CAS 484-11-7 MF C14H12N2 MW 482.63 EINECS 207-601-9 Refractive index 1.6152 (estimate)

Chemical Reagents Congo Red CAS 573-58-0 Acid-base indicators Adsorption Indicators Biological Stains Introduction: Brown-red powder, easily soluble in hot water, soluble in 10 parts of cold water, the solution is yellow-red. Uses: 1. Mainly used for dyeing textiles and paper products such as cotton, linen, silk, etc. 2. Used as an indicator. Commonly used indicator in laboratories. It is also a kind of carcinogenic disperse dye, used for standard product detection. 3. Used

Chemical Reagents Brilliant Green CAS 633-03-4 Acid-base indicators Biological Stains Dyes Introduction: Green sandy substance with golden luster. Soluble in cold and hot water, the aqueous solution is green. Uses: 1. Used for dyeing cotton, silk, acrylic and linen. Also used for dyeing paper and making lakes. It can be used as an external disinfectant in medicine. 2. Mainly used for dyeing cotton, silk, acrylic and linen, and can also be used for dyeing paper and making

Chemical Reagents Bromocresol Green CAS 76-60-8 Cell Stains Biological Stains Acid-base Indicators Introduction: Bromocresol green is also known as 3,3',5,5'-tetrabromo-m-cresolsulfonylphthalide and γ-Sultone. It is precipitated from acetic acid as fine light yellow crystals. Relative molecular weight 698.05. Melting point 218-219℃. It is very sensitive to alkali and shows a special blue-green color when it encounters alkaline aqueous solution. Bromocresol green can be used

Chemical Reagents Bromocresol Green CAS 76-60-8 Cell Stains Biological Stains Acid-base Indicators Introduction: Bromocresol green is also known as 3,3',5,5'-tetrabromo-m-cresolsulfonylphthalide and γ-Sultone. It is precipitated from acetic acid as fine light yellow crystals. Relative molecular weight 698.05. Melting point 218-219℃. It is very sensitive to alkali and shows a special blue-green color when it encounters alkaline aqueous solution. Bromocresol green can be used

Chemical Reagents Methyl Orange CAS 547-58-0 Biological Stains and Acid-base Indicators Introduction: Water-soluble eosin Y is a chemically synthesized acidic dye that dissociates into negatively charged anions in water and combines with positively charged cations of the amino groups of proteins to stain the cytoplasm. The cytoplasm, red blood cells, muscles, connective tissue, eosinophilic granules, etc. are stained in varying degrees of red or pink, forming a sharp contrast

Chemical Reagents Eosin Y/Acid Red 87 CAS 17372-87-1 Biological Stains and Chemical Indicators Introduction: Water-soluble eosin Y is a chemically synthesized acidic dye that dissociates into negatively charged anions in water and combines with positively charged cations of the amino groups of proteins to stain the cytoplasm. The cytoplasm, red blood cells, muscles, connective tissue, eosinophilic granules, etc. are stained in varying degrees of red or pink, forming a sharp

Chemical Reagents Giemsa stain CAS 51811-82-6 Biological Stains Diagnostic Reagents Analytical Reagents - colorants Introduction: Giemsa stain can be used as a dye intermediate and analytical reagent. It is used to determine indole, skatole, urea blue, tryptophan and ergot alkaloids, and is also used to distinguish serum eruptions from scarlet fever. In terms of dyes, it can be used to synthesize pressure-sensitive and heat-sensitive dyes. Uses: 1. Used as a protozoan stain,