Name | Cadmium stearate |
Synonyms | alaixol11 CADMIUM STEARATE Cadmium stearate cadmium distearate cadmium(ii)stearate cadmiumoctadecanoate cadmium octadecanoate cadmiumstearate,light cadmiumsoaps(stearate) cadmium dioctadecanoate cadmium distearate, pure Cadmiumstearateminwhitepowder octadecanoic acid cadmium salt |
CAS | 2223-93-0 |
EINECS | 218-743-6 |
InChI | InChI=1/2C18H36O2.Cd/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2 |
Molecular Formula | C36H70CdO4 |
Molar Mass | 679.35 |
Density | 1.28g/cm3 |
Melting Point | 103~110℃ |
Boling Point | 359.4°C at 760 mmHg |
Flash Point | 162.4°C |
Vapor Presure | 8.58E-06mmHg at 25°C |
Appearance | White powder |
Storage Condition | Room Temprature |
Physical and Chemical Properties | White fine powder. |
Use | Used as a plastic stabilizer, plastic film smoothing agent, also used in the manufacture of rubber products |
Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S53 - Avoid exposure - obtain special instructions before use. |
UN IDs | 2570 |
Hazard Class | 6.1(b) |
Packing Group | III |
Toxicity | LD50 orl-rat: 1125 mg/kg GISAAA 35(2),98,70 |
NIST chemical information | Information provided by: webbook.nist.gov (external link) |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
overview | cadmium stearate, also known as cadmium octadecanoate, has a white fine powder or granular appearance with a molecular weight of 679.36. Melting point 103~110 ℃. Relative density 1.28. Soluble in hot ethanol, insoluble in water. In case of strong acid, it is decomposed into stearic acid and corresponding cadmium salt. It is obtained by the reaction of sodium stearate with cadmium sulfate or cadmium chloride. It can be used as a heat stabilizer and lubricant for polyvinyl chloride. It has excellent transparency, light stability, water resistance and electrical insulation. The initial coloring property is very small, the thermal stability is high, and the weather resistance of the product is good. It can be used alone or in combination with barium soap, organotin compound, epoxy compound or phosphite, with significant synergistic effect. It is often used with barium soap, barium-zinc soap or barium-lead soap for soft products such as films, flakes, and artificial leather. |
preparation method | firstly, stearic acid is dissolved in 20 times the mass of hot water, caustic soda solution with mass concentration of 1074kg/m3 is added, and saponification reaction is carried out at about 75 ℃ to generate dilute sodium stearate solution. The metal cadmium is dissolved in sulfuric acid and nitric acid to prepare cadmium sulfate solution, the cadmium sulfate solution is added to the sodium stearate solution, and the metathesis reaction is carried out at about 55 ℃, and the product cadmium stearate is precipitated. After filtration, washing with water, and drying at 70 ℃ ~ 75 ℃, the finished product is obtained. Fig. 1 is the reaction formula |
product standards | see table -1. Table 1 is the product standard of cadmium stearate |
use | it is a heat stabilizer and lubricant for PVC. it is an excellent variety of heat stabilizer for main metal soap. it has small coloring property at the initial stage, excellent light stability and transparency. it endows the product with good thermal stability, weather resistance, lubricity and transparency. it can be used alone, but cadmium chloride generated after absorbing hydrogen chloride can promote dehydrochlorination reaction. It is often used with barium soap, organotin compounds, epoxy compounds or phosphites, which has a significant synergistic effect. It is often used with barium soap, barium-zinc soap or barium-lead soap and used in soft products such as films, flakes, and artificial leather. The processing operability is not very good. When the processing temperature is low, the plasticization is incomplete, and it is easy to coking when the temperature is too high. The combination of lead stabilizers in hard products can improve processability. It has the disadvantage of being contaminated by sulfide. When the dosage is large, it is easy to segret and scale. Products that are toxic and should not be used in contact with food. (2016-04-25) Used as light-resistant transparent stabilizer for polyvinyl chloride and other plastics, smooth agent and transparent softener for advanced rubber products and films Stabilizer; Lubricant; Rubber products smooth agent and transparent softener Used as heat-resistant and light-resistant transparent stabilizer for plastics such as polyvinyl chloride, smooth agent for advanced rubber products and films, transparent softener Used as plastic stabilizer, smooth agent for plastic films, also used in the manufacture of rubber products |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |