oxidizer

State news agency RIA-Novosti said the cause was failure of the pressurization system of the oxidizer tank of the central block of the rocket.

At around that time, a delivery driver arrived with 4,000 gallons of an unspecified oxidizer.

Because so many different types of goods flow through Amazon’s warehouses, the company has designated sites for flammable, oxidizer and corrosive products.

At Sohae's main launch pad, crews appear to have completed modifications to the gantry tower, while work continues on a storage for fuel and oxidizer.

For solid-fuel missiles, fuel and oxidizer are mixed together into a hard chemical mixture, then packed into a metal cylinder ready for ignition.