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   HYDROGEN FLUORIDE   Anhydrous   Technical Data Sheet Solvay Fluorides, LLC  AHF #3324 05/2014 Copyright 2005-2014  All Rights Reserved 1.800.765-8292 www.solvaychemicals.us   HYDROGEN FLUORIDE ANHYDROUS CHEMICAL ANALYSIS CHEMICAL ANALYSIS SPECIFICATION TYPICAL ANALYSIS HF, % 99.96 minimum 99.99 SO 2 , ppm 50 maximum <5 H 2 SiF 6 , ppm 50 maximum <25 Fe, ppm 10 maximum <3 Residue on Ignition, ppm (non-volatile acid as H 2 SO 4 ) 50 maximum 20  As, ppm 10 maximum <2 H 2 O, ppm (1)  100 maximum <30 Cl, ppm 10 maximum <3 (1) Conductivity Method  Anhydrous hydrogen fluoride is a dangerous chemical when handled improperly. For safety information and handling recommendations, please contact Solvay Fluorides at www.solvaychemicals.us. PHYSICAL PROPERTIES  Anhydrous hydrogen fluoride (AHF) is a colorless liquid corrosive, and has a sharp and penetrating odor. AHF vapor reacts with the moisture in the atmosphere to form a visible dense cloud. Hydrofluoric acid in liquid or vapor form is extremely dangerous and burns skin, eyes and mucous membranes. ANY  exposure requires immediate first aid and medical attention. For further information on first aid and medical procedures, request our current publication.   HYDROGEN FLUORIDE   Anhydrous   Technical Data Sheet Solvay Fluorides, LLC  AHF #3324 05/2014 Copyright 2005-2014  All Rights Reserved 1.800.765-8292 www.solvaychemicals.us   Boiling Point (760 mm Hg) º C º F 19.5 67.1 Critical Density, g/mL Critical Volume, mL/g · mol 0.29 69.0 Freezing Point º C º F -83.5 -118.3 Specific Heat, Liquid 0º C (32º F) cal/g · º C (Btu/lb · º F) 0.61 Vapor Pressure, 25º C (77º F) mm Hg psia 37.8º C (100º F) mm Hg psia kpa 912.0 17.6 1410.0 27.3 188.0 Kj/Kg · º K Vaporization heat, at boiling point cal/g BTU/lb KJ/kg 2.55 81.0 146.0 340.0 Density Liquid, 0º C (32º F) g/mL (T/m 3 ) lb/gal 1.015 8.47 Refraction index, n 25  D Surface Tension at Boiling Point 1.157 Viscosity 0º C (32º F), cP (mPa · s) 10º C (50º F), cP (mPa · s) 0.26 0.23 Dinas/cm (mN/m) Dielectric Constant, 0º C (32º F), 8.6 83.6 Critical Temperature º C º F 188.0 370.4 Conductivity, 0º C (32º F), mhos/cm S/m <1.6 x 10 -6  <1.6 x 10 -4  Critical Pressure atm MPa 64.0 6.48 . CHEMICAL PROPERTIES Hydrofluoric acid reacts with metals located up to hydrogen in the Electrochemical Table of Metals to form fluoride salts. It also reacts with metal carbonates, oxides and hydroxides. Tetra silicon fluoride and fluorosilicic acid are formed when hydrofluoric acid reacts with silicon and silicic acid. Hydrofluoric acid attacks glass. HF aqueous solutions are better handled in the laboratory using polyethylene and polypropylene containers.  Anhydrous hydrogen fluoride reacts with olefins to produce organic fluorides and with halogenated organic compounds to produce fluorinated organic compounds. AHF forms stable complexes with metallic fluorides and also acts as a catalyst in reactions that involve formation of carbon-carbon links. Hydrofluoric acid may produce considerable heat when it is diluted into water and requires a cooling process for preparation of dilutions.   HYDROGEN FLUORIDE   Anhydrous   Technical Data Sheet Solvay Fluorides, LLC  AHF #3324 05/2014 Copyright 2005-2014  All Rights Reserved 1.800.765-8292 www.solvaychemicals.us   Hydrogen fluoride forms a constant boiling point mixture with water at 37.73 weight percentage and 111.4º C (232º F). EXPLOSION OR FIRE DANGER Hydrofluoric acid is not flammable but is difficult to contain since it corrodes many substances.  AHF corrosive action with moisture present could result in formation of hydrogen gas in pipelines and metallic containers. Hydrogen accumulation represents a fire or explosion danger. Potential ignition sources (sparks or flame) are not allowed in the areas where equipment is located that contains hydrofluoric acid. CONSTRUCTION MATERIALS The appropriate selection of construction material to be used with Hydrofluoric acid is decided according to operation conditions and variables that affect corrosion. Temperature, pressure, moisture and velocity, aeration and impurities are factors that determine material selection. Each application of storage and handling must be studied carefully before specifying the materials.  Anhydrous Hydrofluoric Acid - Ductile steel totally passivated (de-oxidized) is generally satisfactory for AHF storage and handling at temperatures up to 150º F (66º C). Hydrogen blistering could occur if the plates contain inclusions. De-sulphurized steels (0.10% maximum S) have less probabilities of blistering. For higher temperatures, MONEL a  and HASTELLOY b  may be acceptable. Fluorocarbon resins TEFLON c  TFE and FEP are resistant to all hydrofluoric acid concentrations up to 500º F (260º C) and 400º F (204º C), respectively. For pumps used at ambient temperature ALLOY 20, HASTELLOY b  and MONEL a may be acceptable. Steel should not be used for close fitting moving parts because the corrosive film will shorten the tolerances and cause their immobilization. Do not use forged steel, stainless steel class 400 or hardened steels for AHF service. Hardened MONEL a  is conducive to corrosion cracking if air moisture is in contact with AHF or if a substantial aeration occurs. Copper and its alloys are not recommended when flows are at high velocity. a  Reg. U.S. Pat & Tm. Off., International Nickel Company b  Reg. U.S. Pat & Tm. Off., Cabot Corporation c  Reg. U.S. Pat & Tm. Off., DuPont Company; manufactured only by DuPont Some information provided by Quimica Fluor, S.A. de C.V., Mexico City, Mexico SHIPPING CONTAINERS Solvay Fluorides ships bulk anhydrous hydrofluoric acid in railcars and trucks that meet US Department of Transportation (DOT) specifications. The equipment is selected based on the size of the shipment requested to accommodate different volumes up to the legal maximum railway or highway load limits. DOT AND FREIGHT DESCRIPTION Hazardous Material Description Hydrogen fluoride, anhydrous Haz. Mat. Class, I.D.#, Packing Group 8, UN 1052, PG I, Poison  –  Inhalation Hazard Freight Classification Anhydrous Hydrofluoric Acid Principal CAS Number 7664-39-3 RQ 100 lb. Placard Corrosive/Subsidiary  –  Poison Inhalation Hazard (toxic)   Label Corrosive/Subsidiary Poison (toxic)   HYDROGEN FLUORIDE   Anhydrous   Technical Data Sheet Solvay Fluorides, LLC  AHF #3324 05/2014 Copyright 2005-2014  All Rights Reserved 1.800.765-8292 www.solvaychemicals.us   Before using, read Safety Data Sheet (SDS) for this chemical. Solvay Fluorides, LLC 24-hour Emergency Phone Number  –  800-424-9300 (CHEMTREC  ®  ) To our actual knowledge, the information contained herein is accurate as of the date of this document. However, neither Solvay Fluorides, LLC, nor any of its affiliates, makes any warranty, express or implied, or accepts any liability in connection with this information or its use. This information is for use by technically skilled persons at their own discretion and risk and does not relate to the use of this product in combination with any other substance or any other process. This is not a license under any patent or other proprietary right. The user alone must finally determine suitability of any information or material for any contemplated use in compliance with applicable law, the manner of use and whether any patents are infringed. This information gives typical properties only and is not to be used for specification purposes. Solvay Fluorides, LLC reserves the right to make additions, deletions or modifications to the information at any time without prior notification. Trademarks: Trademarks and/or other Solvay Fluorides, LLC products referenced herein are either trademarks or registered trademarks of Solvay Fluorides, LLC or its affiliates, unless otherwise indicated. Before using, read the Safety Data Sheet (SDS) for the chemical.
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