vitriolic

adj. of or pertaining to vitriol; bitingly sarcastic; resembling glassy metallic sulfate

Sulfuric (or sulphuric) acid, H2SO4, is a strong mineral acid. It is soluble in water at all concentrations. It was once known as oil of vitriol, coined by the 8th-century Arabian alchemist Jabir ibn Hayyan (Geber) after his discovery of the chemical. Sulfuric acid has many applications, and is one of the top products of the chemical industry. World production in 2001 was 165 million tonnes, with an approximate value of US$8 billion. Principal uses include  ore processing, fertilizer manufacturing, oil refining, wastewater processing, and chemical synthesis.
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Adjective
1. harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"
(synonym) acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, venomous, virulent
(similar) unpleasant
2. of a substance, especially a strong acid; capable of destroying or eating away by chemical action
(synonym) caustic, corrosive, erosive
(similar) destructive

(a.)
Of or pertaining to vitriol; derived from, or resembling, vitriol; vitriolous; as, a vitriolic taste. Cf. Vitriol.
  

Synonyms and related words:
acerbic, acid, acidulous, acrid, acrimonious, antagonistic, antipathetic, asperous, astringent, belligerent, biting, bitter, caustic, clashing, colliding, conflicting, cutting, despiteful, double-edged, edged, envenomed, escharotic, fierce, full of hate, harsh, hateful, hostile, incisive, irritating, keen, malevolent, malicious, malignant, mordacious, mordant, nose-tickling, penetrating, piercing, piquant, poignant, pungent, quarrelsome, rancorous, repugnant, rigorous, rough, scathing, set against, severe, sharp, sore, sour, spiteful, stabbing, stinging, strident, stringent, tart, trenchant, vehement, venenate, venomous, violent, virulent