synthetic tanning agent No.28 - Names and Identifiers
synthetic tanning agent No.28 - Physico-chemical Properties
PH | 4~6 |
Storage Condition | 置于阴凉库内,5~30℃条件下,贮存期12个月。本品按非危险品存贮。运输时应防止曝晒、雨淋。 |
Physical and Chemical Properties | Red-brown viscous liquid, easily soluble in water. It has good permeability and 1.3 relative density (25 ℃). |
Use | Tanned fur, goatskin lining, and composite tanning of heavy leather. |
Caution | Irritating, pay attention to protection. Wash immediately with soap and water if it gets on the skin. Do not come into contact with iron products. |
synthetic tanning agent No.28 - Preparation method
Open Data Verified Data
The condensation of phenol and formaldehyde under acid catalysis yields product 1. In addition, phenol is reacted with formaldehyde and Na2SO3 to obtain sodium hydroxybenzenesulfonate 2 after post-treatment. After 1 and 2 are condensed, adjust the pH value of 4-6 to be the finished product.
Last Update:2024-01-02 23:10:35
synthetic tanning agent No.28 - Introduction
Tanning agent 28 is an organic compound with the chemical name 2,5-diacetylhydroxybenzene. The following is a description of the nature, use, preparation and safety information of tanning agent No. 28:
Nature:
-Tanning agent No. 28 is a colorless or light yellow solid, stable at room temperature.
-It has low solubility in water and better solubility in organic solvents (such as ethanol and acetone).
-Tanning agent No. 28 has good stability, heat resistance and chemical resistance.
Use:
-Tanning agent No. 28 is mainly used as a tanning agent for leather products. It can combine with collagen in leather to make leather soft, durable and has a good texture.
-In addition, tanning agent No. 28 can also be used as a fixing agent for dyes in the dye industry to enhance the adhesion of dyes to fibers.
Preparation Method:
-Tanning agent No. 28 can be synthesized by reacting p-hydroxyphenol and an acetylating agent (such as acetic anhydride).
-The specific synthesis method can be by mixing hydroxyphenol and acetic anhydride in an appropriate solvent, adding an acid catalyst (such as sulfuric acid) for heating reaction, and finally extracting, purification and drying gave the product.
Safety Information:
-Tanning agent No. 28 is generally safe for the human body under normal conditions of use, but it is still necessary to pay attention to the proper safety operating procedures.
-Wear appropriate personal protective equipment such as gloves, glasses and protective clothing when used.
-Avoid contact with skin, eyes or mouth, and take care to avoid inhaling its dust or solution.
-Long-term exposure to small amounts of tanning agent 28 has been found in several studies to be potentially irritating to the skin, eyes and respiratory system, so care should be taken to avoid long-term or excessive exposure.
Please note: For the use and safe handling of specific chemicals, the relevant regulations and safety data sheets provided by the manufacturer should be followed.
Last Update:2024-04-09 20:52:54