# Organic Acid Anhydride

Pyanodons fluid · internal name `organic-acid-anhydride` · first craftable in tier 4 (pY science pack 2, [tier 4](https://factorio.kalzumeus.com/tier/4.md))
HTML page: https://factorio.kalzumeus.com/fluid/organic-acid-anhydride/

## Produced by (1 recipes)

### Organic Acid Anhydride (`organic-acid-anhydride`)

- 10 s · tier 4 · productivity modules allowed
- Ingredients: 100 × [Phosphoric acid](https://factorio.kalzumeus.com/fluid/phosphoric-acid.md), 5 × [Phosphorous pentasulfide](https://factorio.kalzumeus.com/item/p2s5.md), 100 × [Geothermal Water](https://factorio.kalzumeus.com/fluid/geothermal-water.md), 100 × [Fatty Acids](https://factorio.kalzumeus.com/fluid/fatty-acids.md)
- Results: 100 × [Organic Acid Anhydride](https://factorio.kalzumeus.com/fluid/organic-acid-anhydride.md)
- Made in: Mixer MK 01, Mixer MK 02, Mixer MK 03, Mixer MK 04
- Unlocked by: [Intermetallics - Stage 2](https://factorio.kalzumeus.com/tech/intermetallics-mk02.md)

## Used in (3 recipes)

- Chemical science pack (`chemical-science-pack`, tier 4) → [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md)
- Perylenetetracarboxylic dianhydride (PTCDA) (`ptcda`, tier 4) → [Perylenetetracarboxylic dianhydride (PTCDA)](https://factorio.kalzumeus.com/item/ptcda.md)
- Hardener (`hardener`, tier 7) → [Hardener](https://factorio.kalzumeus.com/item/hardener.md)