substance

Sodium azide

Formula: NaN3
CAS: 26628-22-8
InChIKey: PXIPVTKHYLBLMZ-UHFFFAOYSA-N
ChEBI: CHEBI:278547

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Made by

Sodium azide by the hydrazine / methyl nitrite route, batch, with precipitation from the reaction liquor (670 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

N₂H₄+CH₃NO₂+NaOHgivesNaN₃+CH₄O+2H₂OProduct · Sodium azide from hydrazine, methyl nitrite and sodium hydroxide · one process

Routes compared

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

Per 1 kg of Sodium azide: 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
Sodium azide by the hydrazine / methyl nitrite route, batch, with precipitation from the reaction liquor (670 t/a)Batch plant on a dedicated train: methyl nitrite generated from sodium nitrite, methanol and 98.5 % sulfuric acid at 298 K (R-101) and absorbed over 10 h into hydrazine hydrate and caustic soda with the recycled mother liquor at 313 K (R-102, semi-batch); methanol stripped and the liquor concentrated at 10 kPa(a) (C-101), NaN3 precipitated at 303 K, filtered, washed with methanol and vacuum-dried at 333 K (filter-dryer F-101); 1027.6 kg per batch, 652.6 batches a year	flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2026	Electric power: 0.154 kWh LP steam 350 kPa(a) (still and filter-dryer): 2.3 kWh	Sodium nitrite (sodium-nitrite-1): 1.22 kg Process water (nitrite generator): 3.05 kg Sulfuric acid 98.5 wt% (sulfuric-acid-1): 0.883 kg Hydrazine hydrate 64 wt% N2H4 (hydrazine-1): 0.831 kg Caustic soda 50 wt% (chlor-alkali-1): 1.29 kg Process water (azide reactor): 1.38 kg Methanol make-up (methanol-1): 0.074 kg Nitrogen for inerting R-101 and R-102, breaking C-101's vacuum and the pressure filtrations of F-101: 0.0487 kg	none	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.