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LC1619 5,6-Dimethoxyphthalaldehydic acid
for synthesis


Order number Packaging Quantity Price €
AC28619 Plastic bottle 5 g 38.70


Product information
Synonyms 6-Formyl-2,3-dimethoxybenzoic acid, Opianic acid
Hill Formula C10H10O5
Chemical formula 2-(OHC)-5,6-(CH3O)2C6H2COOH
HS Code 2918 99 90
EC number 208-261-4
Molar mass 210.18 g/mol
CAS number 519-05-1


Chemical and physical data
Solubility 2.5 g/l (20 °C)
Melting point 145 – 148 °C
Molar mass 210.18 g/mol


Safety information
WGK WGK 3 highly water endangering
Disposal 4
Liquid organic acids or solutions should be diluted, if necessary, and carefully neutralized with sodium hydrogen carbonate (Cat. No. 106323) or with sodium hydroxide (Cat. No 106462). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535).


Assay (HPLC, area%) ≥ 99 %
Melting range
– lower value
≥ 145 °C
– upper value ≤ 148 °C
Identity (IR) passes test


Hazard Symbol



Hazard Symbol