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3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione is a heterocyclic compound characterized by a pyrimido[4,5-d]pyrimidine core structure, which features two fused pyrimidine rings. The compound is a derivative of pyrimido[4,5-d]pyrimidines, with a 3,4-dihydro substitution pattern, indicating the presence of two hydrogen atoms attached to the carbon atoms at positions 3 and 4. The 2(1H)-thione functional group is a sulfur-containing moiety, which replaces one of the hydrogen atoms at the 2-position, forming a thione group. 3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione is of interest in medicinal chemistry and may have potential applications in the development of new drugs due to its unique structure and reactivity.

7403-33-0

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Basic information
1. Product Name: 3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione
2. Synonyms:
3. CAS NO:7403-33-0
4. Molecular Formula: C₆H₆N₄S
5. Molecular Weight: 166.2036
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: 316.5°C at 760 mmHg
3. Flash Point: 145.2°C
4. Appearance: N/A
5. Density: 1.5g/cm³
6. Vapor Pressure: 0.000408mmHg at 25°C
7. Refractive Index: 1.729
8. Storage Temp.: N/A
9. Solubility: N/A
10. CAS DataBase Reference: 3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione(CAS DataBase Reference)
11. NIST Chemistry Reference: 3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione(7403-33-0)
12. EPA Substance Registry System: 3,4-dihydropyrimido[4,5-d]pyrimidine-2(1H)-thione(7403-33-0)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 7403-33-0(Hazardous Substances Data)

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7403-33-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7403-33-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,0 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7403-33:
(6*7)+(5*4)+(4*0)+(3*3)+(2*3)+(1*3)=80
80 % 10 = 0
So 7403-33-0 is a valid CAS Registry Number.

7403-33-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name	3,4-dihydro-1H-pyrimido[4,5-d]pyrimidine-2-thione

1.2 Other means of identification

Product number	-
Other names	3,4-Dihydro-1H-pyrimido[4,5-d]pyrimidin-2-thion

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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