substance

Iodine

Formula: I2
CAS: 7553-56-2
InChIKey: PNDPGZBMCMUPRI-UHFFFAOYSA-N
ChEBI: CHEBI:17606

Show in the process graph →

Made by

Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)Main productConcept · not reviewed

Used by

No process in the Atlas uses this yet.

When a process with this chemical is added to the library, it appears here.

Takes part in

I₂+SO₂+2H₂Ogives2HI+H₂SO₄Reactant · Reduction of the blown-out iodine by sulfur dioxide (T-202) · one process
2HI+Cl₂gives2HCl+I₂Product · Liberation of iodine from the recycled hydriodic acid (R-101) · one process
2NaI+Cl₂gives2NaCl+I₂Product · Liberation of iodine from the brine iodide by chlorine (R-101) · one process

Routes compared

One route in the Atlas makes Iodine: nothing to compare yet. A comparison appears when a second route is added.

Per 1 kg of Iodine: inventory from each route's LCI dataset, unallocated; footprints per the functional unit of their own LCA.

Route	Tier, design maturity, review status	Geography, year	Energy	Feedstocks	Key emissions	Footprint	Comparability
Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)iodine from natural iodide brine: acidification with recycled liquors, chlorine oxidation, air blowing-out in a closed air loop, absorption in HI/H2SO4 with SO2, chlorine precipitation, filtration, melting under sulfuric acid, flaking; spent brine neutralised with caustic and reinjected; 1000 t/a	flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2026	Electric power: 4.79 kWh LP steam 450 kPa(a) to the iodine melter (condensate returned): 0.065 kWh	Raw iodide brine from the wellfield (degassed, de-oiled): 3,695 kg Chlorine gas 400 kPa(a) (chlor-alkali-1 product CL2): 0.614 kg Liquid sulfur dioxide (vaporised at the absorber): 0.281 kg Sulfuric acid 98.5 wt% (sulfuric-acid-1 product ACID): 0.203 kg Caustic soda 50 wt% (chlor-alkali-1 product NAOH): 1.14 kg Make-up air to the blowing-out loop: 28.9 kg (free) Process water (absorber make-up): 8.9 kg	CO2 to the environment: 0.325 kg I2 to the environment: 0.000255 kg	no footprint	–

ISO 14044 requires a critical review (by a panel of interested parties, ISO/TS 14071) of a comparative assertion intended to be disclosed to the public. These routes are listed side by side for screening; a statement that one is better than another needs that review. None of these routes has had such a review.