A substituted aldehyde used in a presumptive test for LSD and for psilocybin. A 1% solution of p-DMAB is used in 10% mineral acid (either sulphuric acid or hydrochloric acid). This reagent is called Ehrlick’s reagent or Van Urk’s reagent. LSD is indicated by a purple coloration; psilocybin by a red–brown colour.
p-Dimethylaminobenzaldehyde
- Grassmannian
- grass minimum temperature
- Grassot fluxmeter
- graticule
- grating
- grating spectrometer
- gratitude
- Grattan, Henry (1746–1820)
- Graunt, John (1620–74)
- graupel
- gravel
- Gravettian
- gravimeter
- gravimetric analysis
- gravimetry
- gravitation
- gravitational acceleration
- gravitational collapse
- gravitational constant
- gravitational deflection
- gravitational energy
- gravitational equipotential
- gravitational field
- gravitational field strength
- gravitational force