P4S3 + 6 O2 → P4O6 + 3 SO2

This is an oxidation-reduction (redox) reaction:

4 P-III - 24 e- → 4 PIII (oxidation)

12 O0 + 24 e- → 12 O-II (reduction)

P4S3 is a reducing agent, O2 is an oxidizing agent.

Reactants:

  • P4S3 – Tetraphosphorus trisulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Or 3,5,7-trithia-1,2,4,6-tetraphosphatricyclo[2.2.1.02,6]heptane source: wikipedia, accessed: 2019-09-27
    • Other names: Phosphorus sesquisulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Phosphorus trisulfide source: wikipedia, accessed: 2019-09-27, Phosphorus sulfide source: wikipedia, accessed: 2019-09-27, 3,5,7-trithia-1,2,4,6-tetraphosphatricyclo[2.2.1.02,6]heptane source: wikidata, accessed: 2019-09-02
    • Appearance: Yellow, yellow-green or gray solid source: wikipedia, accessed: 2019-09-27
  • O2
    • Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04

Products:

  • P4O6
    • Names: Phosphorus trioxide source: wikipedia, accessed: 2019-09-27, Phosphorus(III) oxide source: wikipedia, accessed: 2019-09-27, Phosphorus sesquioxide source: wikipedia, accessed: 2019-09-27
    • Appearance: Colourless monoclinic crystals or liquid source: wikipedia, accessed: 2019-09-27
  • SO2 – Sulfur dioxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Sulfurous anhydride source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sulphur dioxide source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-02, Sulfurous acid anhydride source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-28; Colourless gas or compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02