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505-21-5

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505-21-5 Usage

General Description

Hexahydro-pyrimidine is a chemical compound with the molecular formula C5H12N2. It is a colorless liquid with a faint ammonia-like odor, and is important in the synthesis of pharmaceuticals and agricultural chemicals. Hexahydro-pyrimidine is used as a building block in the production of various pharmaceuticals, including antihistamines, antifungal agents, and anti-tumor drugs. It also serves as an intermediate in the synthesis of pesticides and herbicides. Additionally, hexahydro-pyrimidine has potential applications in the synthesis of polymers and surface active agents. Due to its versatile properties, hexahydro-pyrimidine is a valuable chemical for the pharmaceutical and agricultural industries.

Check Digit Verification of cas no

The CAS Registry Mumber 505-21-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,0 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 505-21:
(5*5)+(4*0)+(3*5)+(2*2)+(1*1)=45
45 % 10 = 5
So 505-21-5 is a valid CAS Registry Number.

505-21-5Relevant articles and documents

LITHIUM-ION BATTERY AND APPARATUS

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Paragraph 0158-0159; 0166-0167, (2021/03/13)

This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is a silyl phosphite compound or a silyl phosphate compound or a mixture thereof. The additive C is a halogen substituted cyclic carbonate compound.

LITHIUM-ION BATTERY AND APPARATUS

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Paragraph 0133; 0134, (2021/05/07)

This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

LITHIUM-ION BATTERY AND APPARATUS

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Paragraph 0188; 0189, (2021/05/14)

The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. The positive active material in the positive electrode sheet includes Lix1Coy1M1-y1 O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, and M is selected from one of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A and an additive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is an aliphatic dinitrile or polynitrile compound with a relatively high oxidation potential. The lithium-ion battery of the present application has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

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