# Ammonia and Phosphoric acid

Their prices have moved together.

Source page: https://www.materialinsights.org/links/ammonia-and-phosphoric-acid/

[Ammonia](https://www.materialinsights.org/chemicals/ammonia/) (chemical) and [Phosphoric acid](https://www.materialinsights.org/chemicals/phosphoric_acid/) (chemical): 1 relationship.

## How they are linked

### 1. Price link: co-input

*Cost and price · Strong · Both ways*

Ammonia is combined with phosphoric acid to make DAP and MAP, so both are priced off the same fertiliser cycle. The ammonia proxy is a US nitrogen fertiliser index; monthly moves correlate at 0.39 and yearly moves at 0.83.

- **0.39** monthly change correlation
- **0.83** 12-month change correlation
- **0.93** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.