| Molecular Formula | PbCrO4,PbMoO4,PbSO4 |
| Density | 5[at 20℃] |
| Water Solubility | 10-69.3μg/L at 20℃ |
| Physical and Chemical Properties | molybdenum cadmium red is an inorganic pigment containing lead molybdate, lead chromate and lead sulfate, which can have all kinds of varieties from orange to red. Its color is bright, tinting strength is higher than that of Orange chrome yellow, hiding power and various main resistance indexes are very good. The chemical composition of molybdenum chromium red in general industrial products containing lead chromate [PbCrO4] 15% ~ 85%, lead molybdate [PbMoO4]10% ~ 15%, lead sulfate [PbSO4]3%~ 10%. The molecular formula of molybdenum chromium red is about 25 PbCrO4 · 4 PbMoO4 · PbSO4, or 7 PbCrO4 · PbMoO4 · PbSO4, and the molecular ratio of PbCrO4, PbMoO4 and PbSO4 is changed. Different kinds of pigments may be obtained, in order to achieve a certain hue and tint, the molecular ratio of PbCrO4 and PbMoO4 is often kept within a certain range. The density of molybdenum chrome red is 5.41~6.34g/cm3, the oil absorption is 15.8% ~ 40.0%, the particle diameter is 0.1~1.0 μm, the hiding power is strong, the water resistance is excellent, the paraffin resistance is excellent, excellent solvent resistance, acid and alkali resistance in general. |
| Use | molybdenum chrome red is widely used in coatings, such as orange-red coatings. Can also be made with the white anti-rust pigment similar to the red red appearance of molybdenum chromium red anti-rust paint. Molybdenum chrome red is also often the same as the sun-resistant can be good organic pigment color matching, can be obtained solvent resistance, no gold light, baking temperature resistance of red paint. For plastic coloring, molybdenum Chrome Red is often the same as the better heat resistance of organic pigments with bright heat-resistant red, with carbon black can be mixed into coffee. In terms of ink use, molybdenum chrome red is a kind of orange pigment with similar application performance of chrome yellow. Molybdenum chromium red in the practical application reflects the shortcomings of similar lead cadmium yellow, such as the crystal form is easy to change, so that the color to change, light resistance and weather resistance is not very ideal, in the beginning of 344 with aluminum hydroxide, titanium, cerium and other oxides at the surface |
| Risk Codes | R61 - May cause harm to the unborn child R33 - Danger of cumulative effects R40 - Limited evidence of a carcinogenic effect R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R62 - Possible risk of impaired fertility |
| Safety Description | S53 - Avoid exposure - obtain special instructions before use. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | molybdenum chrome red has been widely used in coatings, such as can be made into orange coating. Can also be made with the white anti-rust pigment similar to the red red appearance of molybdenum chromium red anti-rust paint. Molybdenum chrome red is also often the same as the sun-resistant can be good organic pigment color matching, can be obtained solvent resistance, no gold light, baking temperature resistance of red paint. For plastic coloring, molybdenum Chrome Red is often the same as the better heat resistance of organic pigments with bright heat-resistant red, with carbon black can be mixed into coffee. In terms of ink use, molybdenum chrome red is a kind of orange pigment with similar application performance of chrome yellow. Molybdenum chromium red in the practical application reflects the shortcomings of similar lead cadmium yellow, such as the crystal form is easy to change, so that the color to change, light resistance and weather resistance is not very ideal, in the beginning of 344 with aluminum hydroxide, titanium, cerium and other oxides for surface treatment of varieties, light resistance, weather resistance and crystal stability has been improved, after that, the measures of surface treatment with antimony and silicon compounds are shown. At present, the improved products have greatly improved their light resistance, weather resistance and other indicators. used in paint, ink, plastic and other industries |
| production method | a co-precipitation method was used. Reaction equation: 18Pb(NO3)2 7Na2Cr2O7 14NaOH 2Na2SO4 2Na2MoO4 → 2(7 PbCrO4 · PbMoO4 · PbSO4)↓ 36NaNO3 7H2O operation method: Lead nitrate (Pb(NO3)) in typical formula of molybdenum chromium red pigment 2): sodium dichromate (Na2Cr2O7 · 2H2O): sodium molybdate (Na2MoO4 · 2H2O): ammonium molybdate [(NH4)2 MoO4]: sodium sulfate (Na2SO4): sodium hydroxide (NaOH): ammonia (NH3): aluminum sulfate [Al2(SO4)3 · 8H2O] 331:120:0:17:14.8:0:5.4 :( 23-40) or 347:116:28:0:17:32:0:44. The sodium hydroxide solution is added to the sodium dichromate solution for neutralization, and then sodium sulfate and sodium molybdate are added to the lead nitrate solution for thorough stirring and mixing, and then added to the lead nitrate solution for co-precipitation at 15~20 ℃, and nitric acid is added for acidification during co-precipitation, control pH = 2.5~3, continue to stir 15~30min, get bright red precipitate, to prevent Crystal transformation, add stabilizer (such as aluminum sulfate), and adjust pH value with soda ash or sodium hydroxide, the end point pH was adjusted to between 6.5 and 7.5. It is then filtered and dried at 100 °c to give the product as a color panel. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |