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1. Dual Biological Roles of Gluconic Acid: A) Food Applications: a. Acts as a natural acidulant (E574 food additive) b. Provides mild sourness (pH 3.5-4.5) in: • Wines (balances sweetness) • Fruit juices (enhances flavor) • Baked goods (leavening agent) c. Approved by FSSAI as pH regulator B) Agricultural Applications: d. Chelates metal ions (Fe³⁺, Ca²⁺, Mg²⁺) in: • Fertilizers (improves micronutrient absorption) • Irrigation systems (prevents mineral deposits) e. Used in 30% of commercial micronutrient fertilizers 2. Chemical Properties: a. Organic acid (C₆H₁₂O₇) derived from glucose oxidation b. Forms stable complexes with divalent cations 3. Regulatory Status: a. GRAS (Generally Recognized As Safe) by FDA b. Permitted under FSSAI Regulation 3.1.3 4. Why Other Options Are Incomplete: a. (A) or (B) alone only describe partial functionality b. (D) contradicts established biochemical evidence 5. Industrial Production: a. Microbial fermentation (Aspergillus niger) - 85% global production b. Electrochemical oxidation - emerging technology Technical Note: In wines, gluconic acid concentration >1g/L indicates Botrytis cinerea infection (noble rot). Safety: • ADI (Acceptable Daily Intake): 0-50 mg/kg body weight (JECFA) • Banned in infant foods (FSSAI Regulation 2.4) This dual-role functionality makes gluconic acid unique among food acids, justifying the comprehensive answer (C).
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