Molecular Formula | C23H26N2O |
Molar Mass | 346.47 |
Density | 1.0896 (rough estimate) |
Melting Point | 112-114 °C(lit.) |
Boling Point | 481.19°C (rough estimate) |
pKa | 13.78±0.29(Predicted) |
Refractive Index | 1.6300 (estimate) |
Physical and Chemical Properties | Physicochemical properties Malachite green is soluble in water and ethanol. It is a dark green crystal made by one molecule of benzaldehyde and two molecules of N,N-dimethylaniline condensed in hydrochloric acid or sulfuric acid to form a recessive base of tetramethyldiaminotriphenylmethane, which is oxidized by lead dioxide in acidic medium. It is named after its appearance color is malachite green. Malachite green is mostly prepared in the form of oxalate (malachite green oxalate/C23H25N2 HC2O 4 -) and sold on the market. Hydrochloride (malachite green chloride/C23H25 N 2 Cl-) is relatively rare. Malachite green hydrochloride is an industrial-grade chemical substance, which is a double zinc salt synthesized by adding zinc chloride in the production process of malachite green. In aqueous solution, malachite green cation (colored form) combines with active hydroxide ion to form non-ionized colorless alcohol base, which has high lipophilicity. Therefore, it is believed that malachite green may invade cells in the form of alcohol base. |
Use | Uses for acrylic fiber, silk, wool, dianhydride fiber, tannin mordant cotton fiber dyeing and manufacturing lake, solvent dyes, as biological dyeing agent. |
Hazard Symbols | Xn - Harmful![]() |
Risk Codes | 22 - Harmful if swallowed |
WGK Germany | 3 |
RTECS | DN8600000 |
Raw Materials | Benzotrichloride Benzaldehyde N,N-Dimethylaniline |
EPA chemical information | Benzenemethanol, 4-(dimethylamino)-.alpha.-[4-(dimethylamino)phenyl]-.alpha.-phenyl- (510-13-4) |
Malachite green is often used in the ceramic industry, textile industry, leather industry, food color agent and cytochemical dyeing agent, because it can effectively prevent fungal infection and kill parasites in aquatic products. It has been used as insect repellent, insecticide and preservative in aquatic products since 1933. Later, it has been widely used to prevent and treat water mold, gill mold and small melon disease of various aquatic animals. Since the 1990s, scholars at home and abroad have successively discovered that peacock green can cause mild inflammation of fish gills and skin epithelial cells; it can slightly expand the renal lumen and expand the nucleus of renal tubular wall cells; it has mutagenic, Teratogenic, carcinogenic and other hazards.