Editing High-test peroxide (section)

==Availability==
{{Refimprovesect|date=April 2025}}
The available suppliers of high-concentration propellant-grade hydrogen peroxide are, in general, one of the large commercial companies that make other grades of hydrogen peroxide, including [[Solvay (company)|Solvay Interox]], PeroxyChem (formerly FMC Global Peroxygens, a division of [[FMC Corporation]]),<ref>{{cite web |url=https://www.peroxychem.com/news-events/news/one-equity-partners-completes-acquisition-of-peroxychem |title=One Equity Partners Completes Acquisition of PeroxyChem |date=3 March 2014 |work=PeroxyChem |access-date=12 November 2016 |archive-date=13 February 2017 |archive-url=https://web.archive.org/web/20170213030930/http://www.peroxychem.com/news-events/news/one-equity-partners-completes-acquisition-of-peroxychem |url-status=dead }}</ref>{{promotion-inline|date=April 2025}}{{Better source needed|reason=Inappropriate primary source.|date=April 2025}} and [[Evonik]]. Other companies that have made propellant-grade hydrogen peroxide in the recent past include [[Air Liquide]] and [[DuPont]]. DuPont recently sold its hydrogen peroxide manufacturing business to Evonik. High concentration HTP is offered by the [[Institute of Aviation, Warsaw|Łukasiewicz Research Network - Institute of Aviation]], with concentrations up to 99.99%,<ref>{{Cite web |title=Space Technologies |url=https://ilot.lukasiewicz.gov.pl/offer-pdf/space-technologies.pdf |website=Lukasiewicz Institute of Aviation |publication-place=Warsaw}}</ref>{{promotion-inline|date=April 2025}}{{Better source needed|reason=Inappropriate primary source.|date=April 2025}} and Jakusz SpaceTech, with concentrations of 85-98%.<ref>{{cite web | url=https://jakusz-spacetech.com/products/98-hydrogen-peroxide-htp/ | title=85% - 98% Hydrogen Peroxide - HTP - Jakusz | date=6 July 2021 }}</ref>{{promotion-inline|date=April 2025}}{{Better source needed|reason=Inappropriate primary source.|date=April 2025}} WEPA-Technologies can deliver both HTP itself as well as fully automatic plants capable to produce on a 24/7 basis HTP within a concentration range between 90 – 99,5 %.<ref>{{cite web | url=https://www.wepa-technologies.de/services/aerospace-and-rocket-technology/rocket-grade-hydrogen-peroxide-rghtp/ | title=90% - 98% Hydrogen Peroxide - HTP + HTP Production Plants – WEPA-Technologies | date=14 July 2023 }}</ref>{{promotion-inline|date=April 2025}}{{Better source needed|reason=Inappropriate primary source.|date=April 2025}}

Propellant-grade hydrogen peroxide is available to qualified buyers. In typical circumstances, this chemical is sold only to companies or government institutions that have the ability to properly handle and utilize the material. Non-professionals have purchased hydrogen peroxide of 70% or lower concentration (the remaining 30% is water with traces of impurities and stabilizing materials, such as tin salts, phosphates, nitrates, and other chemical additives), and increased its concentration themselves. [[Distillation]] is extremely dangerous with hydrogen peroxide; peroxide vapor can not ignite but the released oxygen can ignite any material that it is in contact with, detonation is possible depending on specific combinations of temperature and pressure, the detonation is the result of rapid reactive evaporation of the liquid resulting in high temperature and pressure resulting in a violent rupture of the containing vessel. In general, any boiling mass of high-concentration hydrogen peroxide at ambient pressure will produce vapor-phase hydrogen peroxide, which can detonate. This hazard is mitigated, but not eliminated, with vacuum distillation. Other approaches for concentrating hydrogen peroxide are [[Sparging (chemistry)|sparging]] and [[Fractional crystallization (chemistry)|fractional crystallization]].

Hydrogen peroxide in concentrations of at least 35% appear on the US Department of Homeland Security's  Chemicals of Interest list.<ref>{{cite journal |url=https://www.dhs.gov/xlibrary/assets/chemsec_appendixa-chemicalofinterestlist.pdf |title=Appendix to Chemical Facility Anti-Terrorism Standards; Final Rule |author=Department of Homeland Security |journal=[[Federal Register]] |date=20 November 2007 |volume=72 |number=223 |pages=65421–65435 |access-date=12 November 2016}}</ref>