| Name | Fast red KL base |
| Synonyms | Fast Red KL Red base KL Azoic diazo 121 Fast red KL base Dycosbase Red KL Base Sanyo Fast Red 6K Base. Fast Red KL Base Special AZOIC DIAZO COMPONENT 121 |
| CAS | 12216-86-3 |
| Molecular Formula | C8H10N2O2 |
| Physical and Chemical Properties | White powder. Slightly soluble in water. |
| Use | red base KL is mainly used for cotton dyeing and cotton printing, and also used for dyeing viscose fiber. Mixed with phenol AS-BS and stained with pink. The coupling force is moderate, and the coupling speed is slow. |
| production method | with O-nitroanisole as raw material, chloromethylation reaction with chloromethyl ether is carried out firstly, then hydrolysis, oxidation, acyl chloride, ammonolysis, and finally by sodium sulfide reduction products. The product was subjected to salt formation and dried to obtain a finished product.. |