Molecular Formula | C37H40N2Na4O13S |
Molar Mass | 844.74 |
Density | 1.427g/cm3 |
Melting Point | 252-256℃ |
Boling Point | 891.6°C at 760 mmHg |
Flash Point | 493°C |
Water Solubility | Soluble in water (460 g/L) at 20°C. |
Solubility | Easily soluble in water, insoluble in absolute ethanol and ether. The aqueous solution is blue, the acidic solution is yellow, the pH is light blue at 6.5~8.5, gray at 10.5~11.6, and dark blue above 12.7 |
Vapor Presure | 3.9E-34mmHg at 25°C |
Appearance | Dark purple to purple-black powder |
Color | Dark green to reddish-brown |
PH | 6.2 (10g/l, H2O, 20℃) |
Storage Condition | Store below +30°C. |
Stability | Stable. Incompatible with strong oxidizing agents. |
Refractive Index | 1.635 |
MDL | MFCD00148905 |
Use | Dark purple to purple-black powder. |
Hazard Symbols | Xi - Irritant |
Risk Codes | R5 - Heating may cause an explosion R36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S24/25 - Avoid contact with skin and eyes. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S15 - Keep away from heat. |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 2934 99 90 |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | methyl thymol blue is used as biological and cell stain and metal titration indicator. metal titration indicator. Spectrophotometric determination of Al3, Ca2, Mg2, Hf4, NbO and Ti4, and complexometric titration determination of Zr4, Bi3, Mg2, Sc3, Cu2 and other metal indicators. |
production method | 1.? Heat sodium immiodiacetate and glacial acetic acid to 50 ℃ to dissolve them into milky shape, cool them to 15 ℃, add thymol blue and 37% formaldehyde in turn under stirring, leave them overnight, add 37% formaldehyde at 15 ℃, stir for 5min, keep the temperature at 50~55 ℃ for 5h, then add the filtered filtrate to anhydrous ethanol, add the crude product to saturated sodium acetate solution, and add a small amount of sodium hydroxide solution, heat and dissolve at 50 ℃, slowly add ethanol, and let stand until the crystallization is complete. The crystallization is washed with ethanol and ether in turn, and dried below 50 ℃, and the dried semi-finished product is the finished product after repeated operation. The process reaction is: |