ChemicalFormulaQ
ChemicalFormulaQ[formula]
returns True if formula is a valid ChemicalFormula object and False otherwise.
Examples
open all close allBasic Examples (2)
Test a valid chemical formula:
ChemicalFormulaQ[ChemicalFormula[{{"C" -> 6, "H" -> 5} -> 2, "I" -> 1, "Br" -> 1}]]A string is not a ChemicalFormula:
ChemicalFormulaQ["CH3(CH2)4CH3"]Scope (1)
When given invalid input, ChemicalFormula will return unevaluated:
ChemicalFormula["X^n"]This will still match a simple pattern:
MatchQ[%, _ChemicalFormula]Use a PatternTest to make a more robust pattern:
MatchQ[%%, _ ? ChemicalFormulaQ]Text
Wolfram Research (2025), ChemicalFormulaQ, Wolfram Language function, https://reference.wolfram.com/language/ref/ChemicalFormulaQ.html.
CMS
Wolfram Language. 2025. "ChemicalFormulaQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ChemicalFormulaQ.html.
APA
Wolfram Language. (2025). ChemicalFormulaQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ChemicalFormulaQ.html