I. Introduction: Fluorescent Brightener CBS-X is a dual-stilbene - biphenyl optical brighteners, for a variety of synthetic detergent, soap, soap manufacturing process of any one optical brightening. CBS-X is characterized by high strength whitening, anti-chlorine bleach, oxygen bleach excellent performance, with excellent wet and dry wash fastness and light fastness, good leveling performance, readily biodegradable. Have greater solubility at low temperatures, synthetic detergent wash varieties, liquid detergents, incense (fat) suitable soap can also be directly used for the optical brightening of cotton, linen, silk, wool, nylon and paper at normal temperature. Second, the performance indicators: Chemical Name: 4,4-bis (2-vinyl benzene sulfonate) biphenyl Cas No: 54351-85-8 Specifications: Weight: 562.6 Appearance: yellow-green crystalline powder Content:. ≥99% Ash: ≤0.3% extinction coefficient: 1105-1181 maximum UV absorption wavelength: 348-350nm solubility in water: 25 ℃ 25g / L 70 ℃ 100g / L 95 ℃ 300g / L Third, the product Advantages: ※ high whitening strength: CBS-X is the history of washing and dyeing industry's best optical brighteners, it is soluble in water, high whitening strength, resistance to chlorine bleach, oxygen bleach, acid and alkali resistant properties, with excellent wash fastness and light fastness wet, so that repeated washing will not change color or fabric yellowing, good leveling properties, the cold water and warm water of cellulose fibers has an excellent whitening effect, and in super-concentrated Heavy dirt liquid detergent with excellent stability. ※ security no residue: CBS-X in excellent whitening effect, but also has a good biodegradability functions, is environmentally friendly fluorescent brighteners, no harm to the human body, the use of safety no residue, without any side effects.