Bitter spar

Bitter-see, /, bitter lake, -spat, m. magnesite (sometimes) dolomite, bitter spar, -stein, m. nephrite Mussiirite picroUte. -atoff, m. bitter prineipieu... 

Klaproth found that precipitated alumina is soluble in caustic potash(i789). He proved by analysis that anhydrite (then called muriacite) is calcium sulphate free from water and that calcite and aragonite are two different crystalline forms of calcium carbonate and confirmed that bitter spar (dolomite) is a compound of calcium and magnesium carbonates. 

Citrate. CjgHjjNjOj. phentanyl, Fentanest, Fentanyl, Sublimate. Crystalline powder, mp 149-151". Bitter taste. One gram dissolves in about 40 ml water. Sol in methanol spar -ingly sol in chloroform. LDM in mice (mg/kg) 112 i.v. 62 s.c. (Gardocki, Yelnosky). 

Leaflets from EtOH. M.p. 303-4 . Sol. HjO, AcOH. Spar. sol. MeOH, EtOH. Prac. insol. EtgO, ligroin. Sublimes above 330°. Heat— lactam, m.p. 191-2°. Bitter taste. 

Leaflets from ligroin. M.p. 57-5° B.p. 204 104-6 /20 mm. Sol. most org. solvents. Spar, sol. ligroin. Sublimes. Bitter taste. Anesthetic action. 

Diacetylsalicyhyl deriv. cryst. from CHCI3. M.p. 136-6°. Sol, warm EtOft, Me2C0. Spar, sol. hot HgO, hot ( gHg, EtjO. Bitter taste. 

---