# Nitric acid and Polyurethanes (MDI, TDI, polyols)

Their prices have moved together.

Source page: https://www.materialinsights.org/links/nitric-acid-and-polyurethanes-mdi-tdi-polyols/

[Nitric acid](https://www.materialinsights.org/chemicals/nitric_acid/) (chemical) and [Polyurethanes (MDI, TDI, polyols)](https://www.materialinsights.org/chemicals/polyurethanes/) (chemical): 1 relationship.

## How they are linked

### 1. Price link: derived product

*Cost and price · Strong · Both ways*

Nitric acid nitrates benzene and toluene to make the building blocks of MDI and TDI, the main polyurethane chemicals. Monthly moves correlate at 0.22 and yearly moves at 0.71, partly a shared energy cycle.

- **0.22** monthly change correlation
- **0.71** 12-month change correlation
- **2.03** fitted elasticity

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