A colourless crystalline dicarboxylic acid, C6H4(COOH)2; r.d. 1.6; m.p. 207°C. The two –COOH groups are substituted on adjacent carbon atoms of the ring, the technical name being benzene-1,2-dicarboxylic acid. The acid is made from phthalic anhydride (benzene-1,2-dicarboxylic anhydride, C8H4O3), which is made by the catalytic oxidation of naphthalene. The anhydride is used in making plasticizers and polyester resins.
Phthalic acid
- Rodnik
- Rodrigues’ formula
- ROE
- roentgen
- roentgenium
- Roentgen, William Konrad (1845–1923)
- ROFL
- rogen moraine
- Roger II (1095–1154)
- Rogers Dry Lake
- Rogers, Robert (1731–95)
- rogue access point
- rogue ISP
- rogue peer
- rogue value
- Rohini
- Rohrer, Heinrich
- Rohypnol
- Rokossovsky, Konstantin Konstantinovich (1896–1968)
- Rokot
- Roland de la Platière, Marie-Jeanne Philipon (1754–93)
- roll
- roll along
- rollback
- roll-call polling