Bleach regulatory information Scheele discovered chlorine in 1774 also found that the chlorine for paper, vegetables and flowers have permanent bleaching effect. 1785 French chemist Beituo Lei made the bleaching effect of bleaching powder used in the production of Tangshan, and noted the ash water solution of chlorine thicker than chlorine, bleach stronger bleach, and no escape of harmful effects of chlorine. 1789 British chemist station Knight (1761 - 1815) chlorine gas dissolved in the milk of lime to prepare the bleach. Today's system of law or the bleach chlorine bleach commonly leads to lime, hydrated lime content slightly less than 1%, because extremely dry lime is not react with chlorine. When the solution is increased alkaline bleaching action carried out slowly. To receive a short bleaching effect must be removed Ca (OH) ?, so use bleach to add a small amount of weak acid industry, such as acetic acid and other food bleaching powder, or adding a small amount of dilute hydrochloric acid. Home use bleach, do not add acid, because the air dissolved carbon dioxide also functions as a weak acid in water. Quality of bleach is by its "available chlorine" and the ability to maintain it over a long period of available chlorine to decide. It is based on the amount of available chlorine is produced when chlorine with hydrochloric acid to be calculated. The reaction of iodine with sodium thiosulfate (Na? S? O?) Solution to titration, you can calculate how much chlorine production. The mass fraction of available chlorine is a bleach oxidation (bleaching effect is mainly caused by oxidation), and industrial products containing chlorine bleach are generally 35% higher can reach 40%. Monitoring Methods: Engineering controls: the production process confined to enhance ventilation. Provide safety shower and eyewash equipment. Respiratory protection: its possible exposure to dust, it is recommended to wear headgear electric powered air-purifying respirators and dust. Eye protection: Respiratory Protection has been protective. Physical protection: wear protective clothing 52,400. Hand protection: Wear rubber gloves. Our social responsibility of business is that we create a sustained development of cost-effective enterprise; social responsibility to contribute to the community, for the public welfare to make modest. Our responsibility to our customers believe that customers' success is our success! We are the best customers trusted partner. Because we are professional so we do better quality at reasonable prices faith-based quality assurance Nanjing Chemical bleach _ _ Zhengzhou Long Xiangcheng bleach by the Zhengzhou Longda Chemical Products Co., Ltd. provided. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) is a leader in Zhengzhou, Henan Province, chemical reagents, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhengzhou Longda Chemical leadership with the staff warmly welcome all inquiries negotiations to create the Zhengzhou Longda Chemical better future.