A Manual of the Chemistry of the Carbon Compounds

TEE CARBON COMPOUNDS. 475
soluble in water. It baa the properties of an aldehyde, and yields on
oxidation hemijainic acid C^H^Og, which is also obtained together
with meconin when opianic acid is heated with potash-solution.
Heawpimric Add C10H10O9 crystallizes in large four-sided prisms,
which melt at 180°, and sublime without decomposition. By heating
it with, concentrated hydriodic acid it yields oxalic acid, methyl
iodide, and two isomeric acids CMHM06.
Opvwk Add crystallizes from hot water in brilliant prisms, and
gives with ferric chloride a lilac colour.
Isopinie Add forms small warty needles, dissolving more freely
than opinic acid, and yielding a deep-blue colour with ferric chloride.
Thebaine C10HaNOs crystallizes from dilute alcohol in plates resembling
beuzoic acid, and from strong alcohol in thick prisms, melting
at 193°. It is a strong base and a violent poison, producing tetanus.
In concentrated sulphuric acid it dissolves with a blood-red colour.
By heating it with hydrochloric acid it is converted into thebmine
hydrochloridc, crystallizing in large laminee having a bitter taste, and
consisting of CwHaNO8.GlH + 3H..O. On adding normal sodium
sulphide to its solution, thebenine is obtained as a white flocculent
precipitate, which rapidly oxidizes in the air. It is isomeric with
thebaiine, but differs from it, by dissolving in sulphuric acid with a
splendid blue colour.
Codamine G^B^NO^ crystallizes from benzene in email prisms
melting at 126°, and giving with ferric chloride or concentrated
nitric acid a deep-green solution.
Lcmdanine C^H^N®* forms small prisms melting at 166°; it gives
with concentrated nitric acid an orange-red solution, and with ferrio
ohloride an emerald-green colour.
Frotopine C^H^NO, forms small prisms melting at 202°; it gives
no colour with feme chloride, and dissolves in sulphuric acid containing
ferric sulphate with a dark-violet colour.
Papaverine CgiH81NO4 crystallizes from alcohol in colourless prisms,
dissolving in hot sulphuric acid with a dark-violet colour; on adding
water to this solution brown amorphous flakes separate out, dissolving
in alkalis with a splendid purple colour.
Nitropa/paveriw COTH^NO^NO^ + H2O is obtained by the action
of strong nitric acid oo papavenne, and crystallizes in yellowish
needles. It is a base forming crystalline salts.
Mcconidine C^H^NO^ is an amorphous mass which is soluble in
caustic potash. It forms amorphous unstable salts, and dissolves in
sulphuric acid with an olive-green colour.
haudanosine C^H^NO^ is very soluble in ether, and crystallizes
from benzene in beautiful white needles melting at 89°. It dissolves
in sulphuric acid containing ferric sulphate with a brownish-red
colour, which on heating first becomes green and then dark-violet.
Rfueadine C^H^NO,, exists in Papaver Ilhasas, and also sometimes
in opium. It is a tasteless crystalline powder, and has no poisonous
properties.