Lead phosphite,dibasic

• CAS: 12141-20-7
• Catalog Number: ACM12141207
• Category: Main Products
• Molecular Weight: 733.58
• Molecular Formula: HO₅PPb₃
• Synonyms: Leadoxidephosphonate;leadoxidephosphonate(pb3o2(hpo3));LEAD PHOSPHITE, DIBASIC;trilead dioxide phosphonate ;plumbous phosphite;Dibasic Lead Phosphite;Dibasic lead(ii) phosphite;Einecs 235-252-2
• IUPAC Name: hydrogenphosphite;lead(2+);oxolead
• Canonical SMILES: OP([O-])[O-].O=[Pb].O=[Pb].[Pb+2]
• InChI Key: LAZQCXJJXWHRDJ-UHFFFAOYSA-N
• Appearance: Solid
• EC Number: 235-252-2
• Exact Mass: 735.88600
• Hazard Statements: Xi,Xn,F
• Packing Group: III
• Safety Description: S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .; S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .; S20:When using, do not eat or drink .
• Stability: Stability
• WGK Germany: 3

Case Study

Effect of Dibasic Lead Phosphite as a Thermal Stabilizer on the Decomposition Temperature of Chemical Blowing Agents

Douibi A, et al. International Journal of Engineering and Technology, 2014, 14(2), 60-64.

The effects of PVC resin and common additives on the decomposition temperature (Td) of azodicarbonamide (ABFA) and their interactions were investigated. The addition of kickers (thermal stabilizers, including dibasic-lead-phosphite) to ABFA resulted in lower Td. Furthermore, it was noted that lead metal based kickers showed the strongest activation effect on Td.
Effect of dibasic Lead phosphite on ABFA
· Accelerators based on lead metal (dibasic lead phosphite) exhibited the strongest activation effect on the decomposition temperature of ABFA.
· It was noted that the experimental Td of the mixture was significantly lower than the predicted Td. This discrepancy can be attributed to the interactions between the kicker and PVC when they are in combination. The presence of the kicker, which serves as a thermal stabilizer, neutralizes the evolved HCl, leading to the elimination of the PVC's effect and allowing the kicker to act predominantly on its own. This occurrence was only evident at a low heating rate.
· At higher heating rates, the decomposition temperature would be delayed, eventually reaching the PVC degradation limit even in the presence of the stabilizer. The increased amount of evolved HCl would then catalyze the PVC degradation, rendering the stabilizer less effective in neutralizing the HCl and resulting in the PVC's predominant role in inhibiting the Td. Consequently, a higher Td than the predicted value would be achieved.

Application of Dibasic Lead Phosphite and Its CALS Production Technology

Kvasyuk A, et al. Chemical Engineering Transactions, 2012, 29(2), 853.

· The composition and structure of dibasic lead phosphite are suitable for stabilizing chlorinated polymers, such as polyvinyl chloride, as it also gives plastics heat resistance and light resistance. The high proportion of lead in the basic salt ensures sufficiently high stability.
· In addition, dibasic lead phosphite is also used in rigid and plasticized cable compositions based on polyvinyl chloride. The photoresist effect of dibasic lead phosphite is better than other known lead salts and has antioxidant properties. It is used in small quantities and at relatively low temperatures (< 200°С).
· Moreover, dibasic lead phosphite is often mixed with tribasic lead sulfate to improve the color of the product and stabilize it.
· The continuous acquisition and life cycle support (CALS) technology can be used in industrial production for the treatment of phosphorus sludge. This work develops a flexible three-product scheme for the treatment of phosphorus sludge, allowing the combination of three productions, namely sodium phosphite and sodium hypophosphite, as well as dibasic lead phosphite.

Custom Q&A

What is the molecular formula of lead phosphite, dibasic?

The molecular formula is HO5PPb3.

What are the synonyms of lead phosphite, dibasic?

The synonyms are Trilead dioxide phosphonate, 12141-20-7, Dibasic lead(II) phosphite, hydrogen phosphite; lead(2+); oxolead, and Lead oxide phosphite.

What is the molecular weight of lead phosphite, dibasic?

The molecular weight is 7.3e+02 g/mol.

What are the component compounds of lead phosphite, dibasic?

The component compounds are Lead monoxide (CID 14827) and Lead (CID 5352425).

When was lead phosphite, dibasic created?

It was created on August 8, 2009.

When was lead phosphite, dibasic last modified?

It was last modified on October 21, 2023.

What is the IUPAC name of lead phosphite, dibasic?

The IUPAC name is hydrogen phosphite; lead(2+); oxolead.

What is the InChI of lead phosphite, dibasic?

The InChI is InChI=1S/HO3P.2O.3Pb/c1-4(2)3;;;;;/h1H;;;;;/q-2;;;;;+2.

What is the InChIKey of lead phosphite, dibasic?

The InChIKey is LAZQCXJJXWHRDJ-UHFFFAOYSA-N.

What is the CAS number of lead phosphite, dibasic?

The CAS number is 12141-20-7.