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The JPCHEMICAL
The JPChemical legendThe JPChemical cleaning servicesLinks in GreeceLinks in the Far East Region(ELLHNIKA) Articles in Greek LanguageMARINE BOILERS REPAIRS LTDMARINE BOILER REPAIRSRULES AND REGULATIONSFIELDS
PlantsOil refineriesPower plantsMarine and ShippingInstallationsIMAGESBoilers. Definitions, Types & TerminologyHRSGHeat ExchangersPipelinesMaterialsIron & Carbon SteelStainless SteelObjectsCupreous metalsCoins and MedalsBuildingsMasonry buildingsCHEMICAL CLEANING AGENTS
Which materials & equipment?Acid CleanersAlkaline CleanersPassivation ChemicalsPumpsTesting and MonitoringSAFETY FIRSTSafety in Chemical CleaningSpill Cleanup RespondMSDS Hydrochloric AcidMSDS of Citric acidMSDS Ammonium bifluorideMSDS of Nitric AcidMSDS Caustic sodaMSDS Ammonium Hydroxide (10-35% )MSDS Trisodium phosphateMSDS of Sodium CarbonateMSDS of Sodium MetasilicateMSDS of Sodium NitriteCHEMICAL CLEANING TUTOR
Chemical Cleaning terminologySpecificationsCommon MistakesTo clean or not to cleanThe sequenceThe ChemistryGlossaryCHEMICAL CLEANING PARAMETERSChemistry UnitsConcentration unitsPhysics and chemistry unitsFlow RatesMathematics unitsWater Treatment|
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| Passivation Chemicals, Selection, Use, Trading |
| Passivation Chemicals, Selection, Use, Trading |
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Sodium Nitrite Chemical Cleaning Use: For the final passivation of carbon stell surfaces of boilers after acid chemical cleaning. General: Synonyms: nitrous acid sodium salt, diazotizing salt, anti-rust Molecular formula: NaNO2 CAS No: 7632-00-0 EINECS No: 231-555-9 Physical data Appearance: white to off-white powder Melting point: 281 C Density (g cm-3): 2.17 Autoignition temperature: 490 C Water solubility: soluble Stability Stable. Incompatible with reducing agents, strong oxidizing agents, organics and other flammable materials, finely powdered metals. Contact with combustible material may lead to fire. Hygroscopic. Environmental information Very toxic to aquatic organisms. Transport information UN No 1500. Hazard class 5.1. Packing group III. Personal protection Safety glasses, adequate ventilation, gloves. Hydrogen Peroxide, 30% solution Chemical Cleaning Use: (1) For the final passivation of stainless stell surfaces after acid chemical cleaning. General Synonyms: albone 30, albone 35, albone 50, albone 70, albone 35cg, albone 50cg, albone 70cg, interox, kastone, perone 30, perone 35, perone 50. Data also applies to solutions of similar strength. Note: Typical concentrations lie in the range 3%-35%. Solutions of much higher concentration (e.g. 60% and above) present significantly increased risks, and should not be used unless such strength is absolutely essential. Molecular formula: H2 O2 CAS No: 7722-84-1 EC No: 231-765-0 Physical data Appearance: colourless liquid Melting point: ca. -28 C Boiling point: ca. 114 C Specific gravity: typically near 1.19 Vapour pressure: 23.3 at 30 C Flash point: Explosion limits: Autoignition temperature: Stability Unstable - readily decomposes to water and oxygen. Light sensitive. May develop pressure in the bottle - take care when opening. Forms potentially explosive compounds with ketones, ethers, alcohols, hydrazine, glycerine, aniline, sodium borate, urea, sodium carbonate, triethylamine, sodium fluoride, sodium pyrophosphate and carboxylic acid anhydrides. Materials to avoid include combustibles, strong reducing agents, most common metals, organic materials, metallic salts, alkali, porous materials, especially wood, asbestos, soil, rust, strong oxidizing agents. Toxicology Toxic. Corrosive - can causes serious burns. Eye contact can cause serious injury, possibly blindness. Harmful by inhalation, ingestion and skin contact. Typical OEL 1 ppm. Transport information UN Major hazard class 5.1. Packing group II. UN No 2014. EMS No 5.1-02. Personal protection Safety glasses are essential; acid-resistant gloves are suggested. Suitable ventilation. |
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