| PH | 2.0~3.0 |
| Physical and Chemical Properties | Chemical properties light green powder. Positive for charge. Soluble in hot water and have good permeability. |
| Use | Uses for pig, cattle, sheep garment leather and other light leather retanning. |
| 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. Place in a cool storage area. This product is stored |
Add 2mol of 4,4 '- dihydroxydiphenylsulfone to the reactor, preheat to about 40 ℃, and start dripping 37% of formaldehyde aqueous solution (totaling 1.01mol of formaldehyde). After the formaldehyde aqueous solution is added, keep it warm and stir at 98-100 ℃ for 2 hours. Then dehydrate and add 98% concentrated sulfuric acid for sulfonation. After sulfonation, remove sulfuric acid. Add chrome tanning agent and filler. Spray dry the finished product.