superacidadj.n.

1808 W. H. Wollaston in Philos. Trans. (Royal Soc.) 98 96 I had observed the same law to prevail in various other instances of super-acid and sub-acid salts.

1814 Philos. Trans. (Royal Soc.) 104 10 They [sc._KCl & NaCl] are not liable to be superacid, and are not decomposed by heat.

1831 S. T. Coleridge Coll. Lett. (1971) VI. 871 All the signs of superacid Blood co-exist in their utmost prominence in the malignant Sea-Scurvy.

1927 J. B. Conant & N. F. Hall in Jrnl. Amer. Chem. Soc. 49 3047 We investigate certain of the properties of these solutions in which salt formation is exceptionally complete, and we propose to call such solutions ‘superacid solutions’.

1934 Brit. Med. Jrnl. 7 July 6/1 The findings were: super-acid gastric juice; spastic colon; raised blood pressure..; and raised basal metabolic rate.

1979 Science 5 Oct. 14/3 Two superacid systems used very frequently are HSO₃F-SbF₅ (Magic Acid)..and HF-SbF₅ (fluoroantimonic acid).

1987 Nature 12 Nov. 108/2 The nitrogen oxides would react with water..to produce large amounts of nitric acid, causing superacid rainfall.

2009 G. A. Olah et al. Superacid Chem. (ed. 2) ii. 37 Chlorosulfuric acid is rarely used for its protonating superacid properties.

1849 Farmer's Mag. Oct. 289/1 To discharge all the gas that can be developed by the operation of the super-acid that is found in alum.

1861 B. Ridge Ourselves, our Food, & our Physic 139 As soon as all vomiting has ceased, the alkaline medicines should be given, to complete the unloading of the stomach from super-acids.

1968 Jrnl. Amer. Chem. Soc. 90 2726/1 (caption) Chemistry in super acids.

1979 Science 5 Oct. 13/3 All protic acids stronger than 100 percent sulfuric acid should be classified as superacids.

2004 B. Bunch & A. Hellemans Hist. Sci. & Technol. 693/4 1994..George A. Olah..is awarded the Nobel Prize in chemistry for his use of superacids and cryogenics to create and stabilize carbocations.

1857 W. A. Miller Elements Chem. III. vi. §3. 425 A remarkable superacid salt (KO, 2HO, 2(C₈H₄O₆) 3Aq).

1907 Jrnl. Chem. Soc. 91 1521 After a fair quantity of free acid had crystallised, crystals of superacid salt were next obtained.

1992 Acta Crystallographica C. 48 878/1 Partially deuterated sodium trihydrogen dimalonate is a superacid salt containing one malonic acid molecule and one hydrogen malonate ion.

1961 Industr. & Engin. Chem. 53 213/1 Some time later Wolfrom suggested a ‘superacidic’ system which consists of equal weights of glacial acetic acid and anhydrous zinc chloride.

1979 Science 5 Oct. 14/3 These superacidic systems can be 10¹⁶ times stronger than 100 per cent sulfuric acid.

2000 T. A. O'Donnell in T. Nakajima et al. Adv. Inorg. Fluorides xi. 345 Because superacids are such strong proton donors, a vast range of compounds act as Bronsted bases in superacidic media.