Periodic acid
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Periodic acid is the highest oxoacid of iodine, in which the iodine exists in oxidation state +7. It can exist in two forms: orthoperiodic acid, with the chemical formula H₅IO₆, and metaperiodic acid, which has the formula HIO₄.
Periodic acid was... Wikipedia
Chemical formula: HIO4 (metaperiodic); H5IO6 (orthoperiodic)
Conjugate base: Periodate
Hazard statements: H271, H314, H372, H400
Melting point: 128.5 °C (263.3 °F; 401.6 K)
Molar mass: 190.91 g/mol (HIO4); 227.941 g/mol (H5IO6)
NFPA 704 (fire diamond): 3 0 0OX
Other cations: Sodium periodate; Potassium periodate