Acetone Cyanohydrin Hazard Summary Identification Reason for Citation How to Determine If You Are Being Exposed
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Modeling of the Free-Radical Copolymerization Kinetics With
Revista de la Sociedad Química de México, Vol. 47, Núm. 1 (2003) 22-33 Investigación Modeling of the Free-Radical Copolymerization Kinetics with Crosslinking of Methyl Methacrylate / Ethylene Glycol Dimethacrylate Up to High Conversions and Considering Thermal Effects Eduardo Vivaldo-Lima*, Rosalba García-Pérez, and Oswaldo J. Celedón-Briones Departamento de Ingeniería Química, Facultad de Química, Conjunto E, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F., CP 04510, México. Tel.: 5622-5256; Fax: 5622-5355; E-mail: [email protected] Recibido el 13 de marzo del 2002; aceptado el 28 de enero del 2003 Resumen. Se usa un modelo matemático para copolimerización por Abstract. A mathematical model for the free radical copolymeriza- radicales libres con entrecruzamiento para modelar el comportamien- tion kinetics with crosslinking of vinyl / divinyl monomers is used to to del sistema de copolimerización metacrilato de metilo (MMA) / model the free-radical copolymerization of methyl methacrylate dimetacrilato de etilén glicol (EGDMA). Las predicciones del mode- (MMA)/ethylene glycol dimethacrylate (EGDMA). Good agreement lo se comparan contra datos experimentales de literatura, teniendo between model predictions and experimental data from the literature buena concordancia a bajas conversiones, y bajas concentraciones de is obtained at low conversions, and low crosslinker concentrations. agente de entrecruzamiento. Si se consideran en el modelo los efectos The agreement is also good at high conversions, and intermediate térmicos asociados a la polimerización con temperatura no uniforme crosslinker concentrations, if thermal effects in ampoule copolyme- en ampolletas de más de 0.5 mm de diámetro externo, la concordan- rization are incorporated into the model, through an energy balance. -
From Acrolein Cyanohydrin
Agric. Biol. Chem., 52 (2), 589-591, 1988 589 Note carried out at iuu~zuirc under an increased pressure/' Here, we present a novel single-step synthesis of 5-(/?- methylthioethyl)hydantoin (2), in which we employed Single-step Synthesis of 5-(j6- single-step reactions of acrolein cyanohydrin (AC, 4), Methylthioethyl)hydantoin methyl mercaptan and ammoniumcarbonate in polar solvents (the AC method), and of acrolein (AL, 1), from Acrolein Cyanohydrin hydrogen cyanide, methyl mercaptan and ammonium and Acrolein carbonate (the ALmethod), accompanied with the for- mation of a-ureido-y-methylthiobutyramide (UMA, 5). Chisei Shibuya and Shunji Ouchi* By an alkaline hydrolysis of these products, dl- methionine (MT, 3) was obtained in an 85%yield on the Food Products & Pharmaceuticals Plant, bases of acrolein cyanohydrin and of acrolein. Asahi Chemical Industry Co., Ltd., Whenthe single-step hydantoination was carried out 6-2700 Asahimachi, Nobeoka, from ACor AL, a mixture of 2 and 5 was obtained. Miyazaki 882, Japan Approximately 12mol% of 5 was formed in each case of *Analytical Research Center, using AL and AC. Asahi Chemical Industry Co., Ltd., These new reactions are summarized in the following 1-3-1 Yako, Kawasaki-ku, Kawasaki-shi, equations: Kanagawa 210, Japan According to this procedure, acrolein and acrolein Received July 27, 1987 cyanohydrin, which are unstable to alkali, were not polymerized by the presence of excess ammoniumcar- bonate,-and the desired reaction proceeded in high yields. Single-step hydantoination of ACusing methanol as the A number of methods for DL-methionine synthesis solvent was carried out, and the effect of quantities of through the hydantoin intermediate have been reported methyl mercaptan, hydrogen cyanide and ammonium since Pierson1* obtained methionine in a 50%yield starting carbonate on the yield of MTwas investigated. -
FULL PAPER Upon the Α-Methylenation of Methyl
FULL PAPER Upon the α-methylenation of methyl propanoate via catalytic dehydrogenation of methanol Patrizia Lorusso,[a] Jacorien Coetzee,[a] Graham R. Eastham[b] and David J. Cole-Hamilton*[a] Abstract: A one-pot system for the conversion of methyl propanoate afford methyl 3-hydroxy-2-methylpropanoate as an intermediate, (MeP) to methyl methacrylate (MMA) has been investigated. In which, in turn, would dehydrate to MMA (Scheme 1). particular, this study is focused on the possibility of performing catalytic dehydrogenation of methanol for the in situ production of anhydrous formaldehyde, which is then consumed in a one-pot base-catalysed condensation with MeP to afford methyl 3-hydroxy-2- methylpropanoate, which spontaneously dehydrogenates to MMA, some of which is subsequently hydrogenated to methyl 2- methypropanoate (MiBu). Scheme 1. Proposed one-pot formation of methyl methacrylate (MMA) from methyl propanote (MeP) and methanol Introduction Alpha methylenation of simple esters can be achieved in low Formaldehyde is a chemical used widely in several industrial yield using condensation of the ester with formaldehyde processes including the manufacture of building materials. A catalysed by caesium oxide on silica at high temperature[3], or by remarkable example in this area is represented by the innovative a complex series of reactions using Meldrum’s acid two-step Alpha technology developed by Lucite for the large Eschemoser’s iodide salt (dimethylmethyleneimmonium scale production of methyl methacrylate (MMA), the essential iodide).[4] -
Transport of Dangerous Goods
ST/SG/AC.10/1/Rev.16 (Vol.I) Recommendations on the TRANSPORT OF DANGEROUS GOODS Model Regulations Volume I Sixteenth revised edition UNITED NATIONS New York and Geneva, 2009 NOTE The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. ST/SG/AC.10/1/Rev.16 (Vol.I) Copyright © United Nations, 2009 All rights reserved. No part of this publication may, for sales purposes, be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying or otherwise, without prior permission in writing from the United Nations. UNITED NATIONS Sales No. E.09.VIII.2 ISBN 978-92-1-139136-7 (complete set of two volumes) ISSN 1014-5753 Volumes I and II not to be sold separately FOREWORD The Recommendations on the Transport of Dangerous Goods are addressed to governments and to the international organizations concerned with safety in the transport of dangerous goods. The first version, prepared by the United Nations Economic and Social Council's Committee of Experts on the Transport of Dangerous Goods, was published in 1956 (ST/ECA/43-E/CN.2/170). In response to developments in technology and the changing needs of users, they have been regularly amended and updated at succeeding sessions of the Committee of Experts pursuant to Resolution 645 G (XXIII) of 26 April 1957 of the Economic and Social Council and subsequent resolutions. -
Cyanovinylation of Aldehydes: Organocatalytic Multicomponent Synthesis of Conjugated Cyanomethyl Vinyl Ethers
molecules Article Cyanovinylation of Aldehydes: Organocatalytic Multicomponent Synthesis of Conjugated Cyanomethyl Vinyl Ethers Samuel Delgado-Hernández 1,2 , Fernando García-Tellado 1,* and David Tejedor 1,* 1 Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Spain; [email protected] 2 Doctoral and Postgraduate School, Universidad de La Laguna, Apartado Postal 456, 38200 La Laguna, Spain * Correspondence: [email protected] (F.G.-T.); [email protected] (D.T.) Abstract: A novel organocatalytic multicomponent cyanovinylation of aldehydes was designed for the synthesis of conjugated cyanomethyl vinyl ethers. The reaction was implemented for the synthesis of a 3-substituted 3-(cyanomethoxy)acrylates, using aldehydes as substrates, acetone cyanohydrin as the cyanide anion source, and methyl propiolate as the source of the vinyl com- ponent. The multicomponent reaction is catalyzed by N-methyl morpholine (2.5 mol%) to deliver the 3-(cyanomethoxy)acrylates in excellent yields and with preponderance of the E-isomer. The multicomponent reaction manifold is highly tolerant to the structure and composition of the aldehyde (aliphatic, aromatic, heteroaromatics), and it is instrumentally simple (one batch, open atmospheres), economic (2.5 mol% catalyst, stoichiometric reagents), environmentally friendly (no toxic waste), and Citation: Delgado-Hernández, S.; sustainable (easy scalability). García-Tellado, F.; Tejedor, D. Cyanovinylation of -
Cyanide Poisoning and How to Treat It Using CYANOKIT (Hydroxocobalamin for Injection) 5G
Cyanide Poisoning and How to Treat It Using CYANOKIT (hydroxocobalamin for injection) 5g 1. CYANOKIT (single 5-g vial) [package insert]. Columbia, MD: Meridian Medical Technologies, Inc.; 2011. Please see Important Safety Information on slides 3-4 and full Prescribing Information for CYANOKIT starting on slide 33. CYANOKIT is a registered trademark of SERB Sarl, licensed by Meridian Medical Technologies, Inc., a Pfizer company. Copyright © 2015 Meridian Medical Technologies, Inc., a Pfizer company. All rights reserved. CYK783109-01 November/2015. Indication and Important Safety Information……………………………………………………………………………….………..…..3 . Identifying Cyanide Poisoning……………………………………………………………………………………………………………….…………….….5 . How CYANOKIT (hydroxocobalamin for injection) Works……………………………………………………………….12 . The Specifics of CYANOKIT…………………………………………………………………………………………………………………………….………17 . Administering CYANOKIT………………………………………………………………………………………………………………………………..……….21 . Storage and Disposal of CYANOKIT…................................................................................................................................26 . Grant Information for CYANOKIT……………………………………………………………………………………………………………………....30 . Full Prescribing Information………………………………………………………………………………………………….………………………………33 Please see Important Safety Information on slides 3-4 and full Prescribing Information for CYANOKIT starting on slide 33. CYANOKIT (hydroxocobalamin for injection) 5 g for intravenous infusion is indicated for the treatment of known or suspected cyanide poisoning. -
Hazardous Chemicals in Secondhand Marijuana Smoke
Hazardous Chemicals in Secondhand Marijuana Smoke “The following 33 marijuana smoke constituents included in Table 1 are listed under 33 Chemicals Proposition 65 as causing cancer: acetaldehyde, acetamide, acrylonitrile, 4- aminobiphenyl, arsenic, benz[a]anthracene, benzene, benzo[a]pyrene, That Can benzo[b]fluoranthene, benzo[j]fluoranthene, benzo[k]fluoranthene, benzofuran, 1,3- butadiene, cadmium, carbazole, catechol, chromium (hexavalent compounds), Cancer chrysene, dibenz[a,h]anthracene, dibenz[a,i]pyrene, dibenzo[a,e]pyrene, “Many of the chemical diethylnitrosamine, dimethylnitrosamine, formaldehyde, indeno[1,2,3,-c,d]pyrene, constituents that have been isoprene, lead, mercury, 5-methylchrysene, naphthalene, nickel, pyridine, and identified in marijuana smoke quinoline.” are carcinogens.” 2009 OEHHA document, Evidence on the Carcinogenicity of Marijuana Smoke Hydrogen Cyanide interferes with the normal use of oxygen by nearly every organ of Hydrogen the body. Exposure to hydrogen cyanide (AC) can be rapidly fatal. It has whole-body (systemic) effects, particularly affecting those organ systems most sensitive to low Cyanide oxygen levels: the central nervous system (brain), the cardiovascular system (heart Is the same chemical used for and blood vessels), and the pulmonary system (lungs). Hydrogen cyanide (AC) is a chemical weapons. chemical warfare agent (military designation, AC). Ammonia gas is a severe respiratory tract irritant. Can cause severe irritation of the Ammonia nose and throat. Can cause life-threatening accumulation of fluid in the lungs Household cleaner used on (pulmonary edema). Symptoms may include coughing, shortness of breath, difficult floors and toilets. There is 3 breathing and tightness in the chest. Symptoms may develop hours after exposure times more in secondhand and are made worse by physical effort. -
Assessment of Portable HAZMAT Sensors for First Responders
The author(s) shown below used Federal funds provided by the U.S. Department of Justice and prepared the following final report: Document Title: Assessment of Portable HAZMAT Sensors for First Responders Author(s): Chad Huffman, Ph.D., Lars Ericson, Ph.D. Document No.: 246708 Date Received: May 2014 Award Number: 2010-IJ-CX-K024 This report has not been published by the U.S. Department of Justice. To provide better customer service, NCJRS has made this Federally- funded grant report available electronically. Opinions or points of view expressed are those of the author(s) and do not necessarily reflect the official position or policies of the U.S. Department of Justice. Assessment of Portable HAZMAT Sensors for First Responders DOJ Office of Justice Programs National Institute of Justice Sensor, Surveillance, and Biometric Technologies (SSBT) Center of Excellence (CoE) March 1, 2012 Submitted by ManTech Advanced Systems International 1000 Technology Drive, Suite 3310 Fairmont, West Virginia 26554 Telephone: (304) 368-4120 Fax: (304) 366-8096 Dr. Chad Huffman, Senior Scientist Dr. Lars Ericson, Director UNCLASSIFIED This project was supported by Award No. 2010-IJ-CX-K024, awarded by the National Institute of Justice, Office of Justice Programs, U.S. Department of Justice. The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect those of the Department of Justice. This document is a research report submitted to the U.S. Department of Justice. This report has not been published by the Department. Opinions or points of view expressed are those of the author(s) and do not necessarily reflect the official position or policies of the U.S. -
The Detoxification of Gold-Mill Tailings with Hydrogen Peroxide by A
J. S. At,. Inst. Min. Metal/., vol. 87, no. 9. Sap. 1987. pp. 279-283. The detoxification of gold-mill tailings with hydrogen peroxide by A. GRIFFITHS., H. KNORRE**, S. GOS:I:,and R. HIGGINS§ SYNOPSIS Hydrogen peroxide is gaining acceptance as a reagent for the treatment of.mining effluents c?ntaininQ cyanide. In this paper some of the chemical and environmental aspects of treatment with hydrogen peroxide are discussed, and one way of improving the economics of the process is described. This is known as selective detoxification, which involves the oxidation of the less stable (cyanide) complexes while not affecting the more stable complexes, which contribute very little to the concentration of free cyanide or to the toxicity of the treated water. SAMEVATTING Waterstofperoksied word al hoe meer aanvaar as 'n reagens vir die behandeling van mynuitvl?eisels w~t si~ni~d bevat. Sommige van die chemiese en omgewingsaspekte van behandeling met waterstofperoks,led word In hlerdle referaat bespreek en een manier om die ekonomie van die proses te verbeter word beskryf. Dlt s~aan bekend. as selektiewe ontgifting en behels die oksidasie van die minder stabiele (sianied) komplekse sonder om die meer stablele komplekse wat baie min tot die konsentrasie van vry sianied, of tot die giftigheid van die behandelde water bydra, te be"invloed. Introduction The detoxification plant supplied by Degussa for use Oxidation of CN- at the gold mine of Ok Tedi Mining Ltd in Papua New CN~ + HP2 CNO- + H2O Guinea represents the first large-scale application of - Hydrolysis of CNO- hydrogen peroxide for the detoxification of tailings from CNO- + 2 H+ a cyanidation plant. -
Hydroxyacetonitrile (HOCH2CN) As a Precursor for Formylcyanide (CHOCN), Ketenimine (CH2CNH), and Cyanogen (NCCN) in Astrophysical Conditions
A&A 549, A93 (2013) Astronomy DOI: 10.1051/0004-6361/201219779 & c ESO 2013 Astrophysics Hydroxyacetonitrile (HOCH2CN) as a precursor for formylcyanide (CHOCN), ketenimine (CH2CNH), and cyanogen (NCCN) in astrophysical conditions G. Danger1, F. Duvernay1, P. Theulé1, F. Borget1, J.-C. Guillemin2, and T. Chiavassa1 1 Aix-Marseille Univ, CNRS, PIIM UMR 7345, 13397 Marseille, France e-mail: [email protected] 2 Institut des Sciences Chimiques de Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35708 Rennes Cedex 7, France Received 8 June 2012 / Accepted 19 November 2012 ABSTRACT Context. The reactivity in astrophysical environments can be investigated in the laboratory through experimental simulations, which provide understanding of the formation of specific molecules detected in the solid phase or in the gas phase of these environments. In this context, the most complex molecules are generally suggested to form at the surface of interstellar grains and to be released into the gas phase through thermal or non-thermal desorption, where they can be detected through rotational spectroscopy. Here, we focus our experiments on the photochemistry of hydroxyacetonitrile (HOCH2CN), whose formation has been shown to compete with aminomethanol (NH2CH2OH), a glycine precursor, through the Strecker synthesis. Aims. We present the first experimental investigation of the ultraviolet (UV) photochemistry of hydroxyacetonitrile (HOCH2CN) as a pure solid or diluted in water ice. Methods. We used Fourier transform infrared (FT-IR) spectroscopy to characterize photoproducts of hydroxyacetonitrile (HOCH2CN) and to determine the different photodegradation pathways of this compound. To improve the photoproduct identifications, irradiations of hydroxyacetonitrile 14N and 15N isotopologues were performed, coupled with theoretical calculations. -
Cyanide Remediation: Current and Past Technologies C.A
CYANIDE REMEDIATION: CURRENT AND PAST TECHNOLOGIES C.A. Young§ and T.S. Jordan, Department of Metallurgical Engineering, Montana Tech, Butte, MT 59701 ABSTRACT Cyanide (CN-) is a toxic species that is found predominantly in industrial effluents generated by metallurgical operations. Cyanide's strong affinity for metals makes it favorable as an agent for metal finishing and treatment and as a lixivant for metal leaching, particularly gold. These technologies are environmentally sound but require safeguards to prevent accidental spills from contaminating soils as well as surface and ground waters. Various methods of cyanide remediation by separation and oxidation are therefore reviewed. Reaction mechanisms are given throughout. The methods are compared in regard to their effectiveness in treating various cyanide species: free cyanide, thiocyanate, weak-acid dissociables and strong-acid dissociables. KEY WORDS cyanide, metal-cyanide complex, thiocyanate, oxidation, separation INTRODUCTION ent on the transport of these heavy metals through their tissues, cyanide is very toxic. Waste waters from industrial operations The mean lethal dose to the human adult is transport many chemicals that have ad- between 50 and 200 mg [2]. U.S. EPA verse effects on the environment. Various standards for drinking and aquatic-biota chemicals leach heavy metals which would waters regarding total cyanide are 200 and otherwise remain immobile. The chemicals 50 ppb, respectively, where total cyanide and heavy metals may be toxic and thus refers to free and metal-complexed cya- cause aquatic and land biota to sicken or nides [3]. According to RCRA, all cyanide species are considered to be acute haz- die. Most waste-water processing tech- ardous materials and have therefore been nologies that are currently available or are designated as P-Class hazardous wastes being developed emphasize the removal of when being disposed of. -
Methyl Methacrylate
METHY METHACRYLATE This substance was considered by a previous Working Group, in February 1978 (IARC, 1979). Since that time, new data have become available, and these have been incorporated into the monograph and taken into consideration in the present evaluation. 1. Exposure Data 1.1 Chemical and physical data 1.1.1 Nomenclature Chem. Abstr. Sem Reg. No.: 80-62-6 Chem. Abstr. Name: 2-Methyl-2-propenoic acid, methyl ester ¡UPAC Systematic Name: Methacrylic acid, methyl ester Synonyms: 2-(Methoxycarbonyl)-1-propene; methyl 2-methylacrylate; methyl 2-methyl- 2-propenoate; MMA 1.1.2 Structural and molecular formulae and relative molecular mass o Il H2C = c- C- 0- CH3 1 CH3 CsHS02 Relative molecular mass: 100.12 1.1.3 Chemical and physical properties of the pure substance (a) Description: Colourless liquid (CYRO Industries, 1987), with a fruity, pungent odour (American Conference of Governmental Industrial Hygienists, 1991) (b) Boiling-point: 100-101 °C (Lide, 1991) (c) Meltng-point: -48 °C (Lide, 1991) (d) Density: 0.9440 at 20 °C/4 °C (Lide, 1991) (e) Spectroscopy data: Infrared (2226), ultraviolet, nucIear magnetic resonance and mass spectral data have been reported (Sadtler Research Laboratories, 1991; US National Library of Medicine, 1993a). if Solubilty: Slightly soluble in water (1.6 gllOO ml at 20 °C), glycerine and ethylene glycol (CYRO Industries, 1987; Bauer, 1990); soluble in acetone, diethyl ether and ethanol (Lide, 1991) -445- 446 IARC MONOGRAPHS VOLUME 60 (g) Volatility: Vapour pressure, 3.87 kPa at 20°C (Ba uer, 1990; Rohm & Haas Co., 1993); relative vapour density (air = 1),3.45 (Verschueren, 1983) (h) Stability: Highly inflammable vapours (Mannsville Chemical Products Corp., 1987); lower explosive limit, 2.1 voL.