H2O2 Handling Safety Overview
H2O2 Handling Safety OverviewMonth, 2015
Overview of H2O2 Hydrogen Peroxide is used in a variety of industries from medical, topaper processing, to propulsion systems. Peroxide is specified as the percentage of pure hydrogen peroxide tothe amount of water in the solution.‒ 90% Peroxide is composed of 90% H2O2 and 10% H2O. Typical grades for propulsion applications range from about 80 to 99%peroxide.‒ These grades are commonly referred to as High Test Peroxide (HTP). At concentrations above 67% peroxide, the decomposition of peroxideproduces enough energy to vaporize the water along with the peroxide. The rate of decomposition is a function of pressure.5/22/17Parabilis Space Technologies Proprietary2
Typical PPE for HTP The three main hazards from handling peroxide are1) Ignition of clothing2) Chemical Burns on skin, eyes, etc.3) Injury resulting from rupture of Pressure Vessel of storage container.To mitigate against these hazards the following PPE is recommended:‒ Eye goggles‒ Face Shield‒ Fully Body suit of Neoprene or other suitable rubber (Can be overalls and coat withhood, just mitigating spill hazard).‒ Rubber boots‒ Rubber gloves Covered in additional detail in Section 6.4 of AFRPL-TR-67-1445/22/17Parabilis Space Technologies Proprietary3
Pressure Sensitivity The rate of decomposition of Peroxide is a function of pressure. When handling peroxide it should only be transferred in, vented,unpressurized containers. Storage containers must be vented at all times.‒ Pressure will slowly build, raising the reaction rate, which can lead to a runaway reaction that will destroy the storage container if it is not vented. For testing requiring the pressurization of hydrogen peroxide, thepressurization should always be done remotely with personnelprotected in the event of a pressure vessel failure. In the event of a sudden build up of pressure in a hydrogen peroxidecontainer, the container should be dumped and the peroxideneutralized with water.5/22/17Parabilis Space Technologies Proprietary4
H2O2 Material Compatibility Hydrogen Peroxide storability (and more generally, compatibility) isbased off of the rate of decomposition when in contact with a givenmaterial. Hydrogen Peroxide Material compatibility is generally ranked througha class structure.‒ Class 1: Materials Satisfactory for Unrestricted use with H2O2‒ Class 2: Materials Satisfactory for Repeated Short-Time Contract with H2O2.Maximum of 4 hours at 160 F or 1 Week at 70 F.‒ Class 3: Materials Satisfactory for Short-Term Contact Only, Less than 1minute at 160 F and 1 hour at 70 F for unpressurized systems. Single use only.‒ Class 4: Not recommended for use with H2O2.5/22/17Parabilis Space Technologies Proprietary5
Class System limitations The class system is only used to provide a relative guide, and is not aperfect system. The class of a given material is a function of concentration andtemperature.‒ For example Material A may be a Class 2 material with 90% peroxide, but aClass 3 material with 98% peroxide at 70 F.‒ There are several materials that are Class 2 at 70 F and Class 4 at 160 F. Surface finish and surface treatment has a large impact oncompatibility. Most Metals need to be passivated prior to service with HTP.5/22/17Parabilis Space Technologies Proprietary6
Aluminum @ 70 F Material90% H2O298% H2O2Aluminum 355Class 2Class 3Aluminum B356Class 1Class 1Aluminum 1060Class 1Class 1Aluminum 1160Class 1Class 1Aluminum 1260Class 1Class 1Aluminum 2014Class 4Class 4Aluminum 2017Class 4Class 4Aluminum 2024Class 3Class 4Aluminum 5254Class 1Class 1Aluminum 5652Class 1Class 1Aluminum 6061Class 2Class 2Aluminum 7072Class 1Class 1Aluminum 7075Class 4Class 4NotesSource: AFRPL-TR-67-1445/22/17Parabilis Space Technologies Proprietary7
Stainless Steel @ 70 F Material90% H2O298% H2O2Notes301Class 2 / 3Class 2 / 3Depends on surface treatment302Class 2 / 3Class 2 / 3Depends on surface treatment304Class 2Class 2316Class 2Class 2329Class 3 / 4Class 3 / 4347Class 2Class 2443Class 4Class 4446Class 4Class 4Depends on surface treatmentSource: AFRPL-TR-67-1445/22/17Parabilis Space Technologies Proprietary8
Inconel 718 Material90% H2O298% H2O2TemperatureNotes718Class 2Class 270 FSurface Finish must be better than10 rms718Class 4Class 4151 FSource: AFRPL-TR-67-144 Note: Surface finish and operating temperature isextremely important when using Inconel 718 with HTP.5/22/17Parabilis Space Technologies Proprietary9
Elastomers and Seal Materials @ 70 FMaterial90% H2O298% H2O2Buna NClass 4Class 4Butyl RubberClass 4Class 4DelrinClass 4Class 4Kel-FClass 1 to 3Class 1 to 3Depends on actual gradePolyethyleneClass 2 to 4Class 2 to 4Depends on actual grade / VendorSiliconClass 2 to 4Class 2 to 4Depends on actual grade / VendorTeflon (Virgin)Class 1Class 1Viton AClass 2 to 4Class 2 to 4Depends on actual grade / VendorViton B (805)Class 1UnknownFrom Dupont, 1967 Vintage NotesSource: AFRPL-TR-67-1445/22/17Parabilis Space Technologies Proprietary10
Metals to avoid Material90% H2O2Material90% H2O2BerylliumClass 4ManganeseClass 4CadmiumClass 4MercuryClass 4ChromiumClass 4MolybdenumClass 4CobaltClass 4NickelClass 4ColumbiumClass 4PlatinumClass 4CopperClass 4SilverClass 4GoldClass 4SodiumClass 4IronClass 4TitaniumClass 4LeadClass 4TungstenClass 4MagnesiumClass 4ZincClass 4Source: AFRPL-TR-67-1445/22/17Parabilis Space Technologies Proprietary11
Buna N Class4 Class 4 Butyl Rubber Class4 Class 4 Delrin Class4 Class 4 Kel-F Class1 to 3 Class 1 to 3 Depends on actual grade Polyethylene Class 2 to 4 Class 2 to 4 Depends on actual grade/ Vendor Silicon Class 2 to 4 Class 2 to 4 Depend
This study presents the feasibility of using a polyvinylpyrrolidone-hydrogen peroxide complex (PVP-H2O2) as an oxidative agent for the solid state forced degradation of a selected drug, vortioxetine HBr. The PVP-H2O2 complex was prepared and characterized using FT-IR spectroscopy. The tablet compacts were made using a mixture of solid PVP-H2O2 .
Preparation of Hydrogen Peroxide Solutions Reagent grade 30% H2O2 is used to prepare our infusion solutions. Hydrogen peroxide, USP food or cosmetic grades are avoided because they contain tin and phosphate compounds to stabilize the H2O2 molecule. Concentrated H2O2 solutions are powerful oxidizers and should be handled with caution. The
2 in which iodosylarene (ArIO) is generated in situ from an iodoarene (ArI) and H2O2 in the presence of methyltrioxorhenium as a catalyst. Further reaction of ArIO with H2O2 produced singlet oxygen.36 Herein, I introduce the rst example of poly[4-diacetoxyiodo]styrene
The oxidation of cyclohexene by in situ generated H2O2 in compressed CO2—an alternative and green approach to the synthesis of adipic acid was also explored using precious metal loaded TS-1 and W-MCM-41 (a silicate mesoporous molecular sieve). Experimental results showed that the oxidation of cyclohexene by in situ generated H2O2 in CO2 was .
Waste Water Treatment Methods 55 O3 O3 (direct ozone feeding) O3 UV (photo-ozone feeding) O3 catalysts (catalytic ozone feeding) H2O2 O3 TiO2 (heterogeneous catalysis) TiO2 UV (photo-catalysis) The preferential use of H2O2 as oxidative agent and HO radicals generator is justified by the fact that the hydrogen peroxide is easy to store, transported and used, and the procedure is
As we saw in our lab, there was an eventual leveling off in the reaction rate after a certain concentration of H2O2, which in our data set, seems to be approximately 2.5M of H2O2. This . catalase enzyme. In a chemistry term, this means that the reaction within the catalase is the new rate-limiting step.7 6 Goodsell, David 7 Biotech Environ .
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