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light beige powder Tragacanth gum occurs as flattened, lamellated, frequently curved fragments, or as straight or spirally twisted linear pieces from 0.5–2.5mm in thickness; it may also be obtained in a powdered form. White to yellowish in color, tragacanth is a translucent, odorless substance, with an insipid mucilaginous taste. Gum tragacanth is the dried exudate from several species of Astragalus (A. gummifer Labillardiere, or other Asiatic species of Astragalus), a shrub that grows wild in More

Catalase is a key enzyme in the metabolism of H2O2 and reactive oxygen species (ROS), and its expression and localization is markedly altered in tumors[1]. Free oxygen radical scavenger. More

Dark purple crystalline powderMore

yellow powderMore

solidChEBI: A fatty amide of lauric acid.More

Colorless Transparent LiquidMore

Sodium dithionite is commonly known as insurance powder, also known as sodium hyposulfite, white crystalline powder or slightly yellow flaky crystals, odorless or with a slight smell of sulfur dioxide. It is very soluble in water and insoluble in alcohol. Its aqueous solution is unstable and belongs to a strong reducing agent. It is easy to absorb oxygen and oxidize when exposed to air, and it is also easy to absorb moisture and heat and deteriorate, and it can seize oxygen in the air to form agglomerates and emit a pungent sour smell. Sodium dithionite has two forms: dihydrate and anhydrous salt. Dihydrate is a slightly yellow flaky crystal with extremely unstable properties. It only exists in alkaline solution. When heated to a certain temperature, it will dehydrate and transform into anhydrous salt; anhydrous salt is a white crystalline powder and exists stably under room temperature drying. Heating sodium dithionite or contact with open flame will cause combustion, and the autoignition point is 250℃. Contact with water can release a large amount of hot sulfur dioxide gas and flammable sulfur vapor, causing violent combustion. When it encounters an oxidant, a small amount of water or absorbs humid air, it can generate heat, causing yellow smoke combustion, and even explosion. Sodium dithionite is toxic and irritating to the eyes and respiratory mucosa. Due to its properties, sodium dithionite can be used as an oxygen absorber in analysis, or as a dye intermediate and bleaching agent. It is also a strong reducing agent that can reduce many metal salts to metals.More