1,2,4-Triazolo[1,5-a]pyrimidine

Modify Date: 2025-08-26 12:54:15

1,2,4-Triazolo[1,5-a]pyrimidine Structure
1,2,4-Triazolo[1,5-a]pyrimidine structure
 Common Name 1,2,4-Triazolo[1,5-a]pyrimidine
CAS Number 275-02-5 Molecular Weight 120.11200
Density 1.48g/cm3 Boiling Point N/A
Molecular Formula C5H4N4 Melting Point 142-145ºC(lit.)
MSDS Chinese USA Flash Point N/A
Symbol GHS07
GHS07		 Signal Word Warning

 Names

Name [1,2,4]Triazolo[1,5-a]pyrimidine
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.48g/cm3
Melting Point 142-145ºC(lit.)
Molecular Formula C5H4N4
Molecular Weight 120.11200
Exact Mass 120.04400
PSA 43.08000
LogP 0.12430
Index of Refraction 1.772

 Safety Information

Symbol GHS07
GHS07
Signal Word Warning
Hazard Statements H315-H319-H335
Precautionary Statements P261-P305 + P351 + P338
Personal Protective Equipment dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes Xi
Risk Phrases 36/37/38
Safety Phrases S26;S37/S39
RIDADR NONH for all modes of transport
WGK Germany 3
HS Code 2933990090

 Synthetic Route

Amitrole structure

Amitrole

CAS#:61-82-5

Tetraethoxypropane structure

Tetraethoxypropane

CAS#:122-31-6

~74%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Kuenstlinger, M.; Breitmaier, E. Synthesis, 1983 , # 1 p. 44 - 47
Amitrole structure

Amitrole

CAS#:61-82-5

3-ethoxyprop-2-enal structure

3-ethoxyprop-2-enal

CAS#:764-63-6

~72%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Kuenstlinger, M.; Breitmaier, E. Synthesis, 1983 , # 1 p. 44 - 47
Amitrole structure

Amitrole

CAS#:61-82-5

3-(Dimethylamino)-2-propenal structure

3-(Dimethylamin...

CAS#:927-63-9

~59%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Al-Saleh, Balkis; Makhseed, Saad; Hassaneen, Huwaida M. E.; Elnagdi, Mohamed Hilmy Synthesis, 2006 , # 1 art. no. P06805SS, p. 59 - 62
Amitrole structure

Amitrole

CAS#:61-82-5

1,1,3,3-Tetramethoxypropane structure

1,1,3,3-Tetrame...

CAS#:102-52-3

~86%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Salgado, Antonio; Varela, Carmen; Collazo, Ana Maria Garcia; Pevarello, Paolo Magnetic Resonance in Chemistry, 2010 , vol. 48, # 8 p. 614 - 622
malonaldehyde structure

malonaldehyde

CAS#:542-78-9

Amitrole structure

Amitrole

CAS#:61-82-5

~55%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Van Den Bos, Eelke D.; Mutikainen, Ilpo; Turpeinen, Urho; Van Albada, Gerard A.; Haasnoot, Jaap G.; Reedijk, Jan Journal of Chemical Crystallography, 2010 , vol. 40, # 8 p. 656 - 660
7-chloro-[1,2,4]triazolo[1,5-a]pyrimidine structure

7-chloro-[1,2,4...

CAS#:52341-91-0

~%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Makisumi; Kano Chemical and Pharmaceutical Bulletin, 1959 , vol. 7, p. 907,910
1H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one structure

1H-[1,2,4]triaz...

CAS#:31592-08-2

~%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Makisumi; Kano Chemical and Pharmaceutical Bulletin, 1959 , vol. 7, p. 907,910
1,2,4-Triazolo[4,3-a]pyrimidine structure

1,2,4-Triazolo[...

CAS#:274-98-6

~%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Sirakawa Yakugaku Zasshi, 1959 , vol. 79, p. 903,905 Chem.Abstr., 1960 , p. 556
2-Hydrazinylpyrimidine structure

2-Hydrazinylpyr...

CAS#:7504-94-1

Formic Acid structure

Formic Acid

CAS#:64-18-6

~%

1,2,4-Triazolo[1,5-a]pyrimidine Structure

1,2,4-Triazolo[...

CAS#:275-02-5

Literature: Sirakawa Yakugaku Zasshi, 1959 , vol. 79, p. 903,905 Chem.Abstr., 1960 , p. 556

 Customs

HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Synonyms

[1,2,4]triazolo[1,5-a]pyrimidine
MFCD00013332
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