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Home> Encyclopedia >   /  Inorganic Acids  /  Pharmaceutical Intermediates  /  Inorganic Chemicals  /  Others  /  Organic Acid
ethyl 5-methyl-2-(trifluoromethyl)pyrazolo[1,5-a]pyridine-3-carboxylate structure
ethyl 5-methyl-2-(trifluoromethyl)pyrazolo[1,5-a]pyridine-3-carboxylate structure

ethyl 5-methyl-2-(trifluoromethyl)pyrazolo[1,5-a]pyridine-3-carboxylate

Iupac Name:dihydroxy(oxo)phosphanium
CAS No.:13598-36-2
Molecular Weight:80.987841
1. Names and Identifiers
1.1 Name
ethyl 5-methyl-2-(trifluoromethyl)pyrazolo[1,5-a]pyridine-3-carboxylate
1.2 CAS No.
1.3 CID
1.4 Molecular Formula
C19H18O3 (isomer)
1.5 Inchi
1.6 InChkey
1.7 Canonical Smiles
1.8 Isomers Smiles
2. 3D Conformer
3. Properties
3.1 Melting Point
4. Safety and Handling
4.1 Risk Statements
4.2 Safety Statements
4.3 HazardClass
4.3 Hazard Note
H290; H302; H314
4.4 PackingGroup
4.5 Transport
UN 2834

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Skin corrosion, Category 1A

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H302 Harmful if swallowed

H314 Causes severe skin burns and eye damage

Precautionary statement(s)

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P280 Wear protective gloves/protective clothing/eye protection/face protection.


P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/\u2026if you feel unwell.

P330 Rinse mouth.

P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].

P363 Wash contaminated clothing before reuse.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P310 Immediately call a POISON CENTER/doctor/\u2026

P321 Specific treatment (see ... on this label).

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.


P405 Store locked up.


P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


6. Computational chemical data
  • Molecular Weight:80.987841g/mol
  • Molecular Formula:C19H18O3
  • Exact Mass:80.974155
  • Monoisotopic Mass:80.974155
  • Complexity:26.3
  • Rotatable Bond Count:0
  • Hydrogen Bond Donor Count:2
  • Hydrogen Bond Acceptor Count:3
  • Topological Polar Surface Area:57.5
  • Heavy Atom Count:4
  • Defined Atom Stereocenter Count:0
  • Undefined Atom Stereocenter Count:0
  • Defined Bond Stereocenter Count:0
  • Undefined Bond Stereocenter Count:0
  • Isotope Atom Count:0
  • Covalently-Bonded Unit Count:1
8. Question & Answer
  • It's very confusing that while H X 2 S O X 4 H X 2 S O X 4 has an n n -factor of 2, whereas H X 3 P O X 3 H X 3 P O X 3 has n n -factor 2 instead of 3. Many tried explaining it to me by molecular structures, but I don't know how to draw them. Could you please try explaining without the help of mole...
  • The two isomers you're referring to both exist and are in equilibrium: When only one or two protons are removed, resonance stabilizes the anions formed, e.g. the H P H O X 3 X − " style="position: relative;" tabindex="0" id="MathJax-Element-6-Frame" class="MathJax" H P H O X 3 X ? H P H ...
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