export interface ParsedElement {
    symbol: string;
    count: number;
}
export interface FormulaParseResult {
    elements: Record<string, number>;
    valid: boolean;
    error?: string;
}
/** `coefficient` is a full-size multiplier at the start of a hydrate segment (the 5 in CuSO4·5H2O). */
export type FormulaPartType = 'element' | 'subscript' | 'superscript' | 'paren' | 'dot' | 'charge' | 'coefficient';
export interface FormulaPart {
    type: FormulaPartType;
    text: string;
}
export declare const ATOMIC_WEIGHTS: Record<string, number>;
/** Parses and renders chemical formulas, computes molecular weight, and generates rich-text formula parts. */
export declare function useChemicalFormula(): {
    parseFormula: (formula: string) => FormulaParseResult;
    calculateMW: (elements: Record<string, number>) => number;
    renderFormulaParts: (formula: string) => FormulaPart[];
};