Aluminum Sulfate
Also known as: Aluminium Sulfate
Aluminum sulfate is a permitted food additive but contributes to dietary aluminum exposure. EFSA has set a tolerable weekly intake of 1 mg/kg bw for aluminum, citing concerns about potential effects on the nervous system and developing fetus at high cumulative exposure.
What it is
Aluminum sulfate (Al2(SO4)3) — an inorganic salt of aluminum and sulfuric acid; commonly known as 'alum' (when potassium-aluminum sulfate).
Firming agent in pickling, modifier in baking powder; broadly used in water treatment.
Why it's flagged
- contributes to aluminum dietary exposure
- EFSA TWI 1 mg/kg bw exceeded by some consumers
- USDA/NCHFP advise against home use
What regulators actually say
"The Panel established a tolerable weekly intake (TWI) of 1 mg aluminium/kg body weight per week. Mean dietary exposure may exceed the TWI in highly exposed consumers."
Regulatory status
United States — FDA
Permitted as a food additive (e.g., 21 CFR 182.1125 aluminum sodium sulfate; 184.1135 aluminum potassium sulfate); food-grade alum permitted as firming agent.
European Union — EFSA
Permitted with restrictions; EFSA TWI 1 mg Al/kg bw.
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