Sodium Chlorite Hazard Summary Identification
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Working with Hazardous Chemicals
A Publication of Reliable Methods for the Preparation of Organic Compounds Working with Hazardous Chemicals The procedures in Organic Syntheses are intended for use only by persons with proper training in experimental organic chemistry. All hazardous materials should be handled using the standard procedures for work with chemicals described in references such as "Prudent Practices in the Laboratory" (The National Academies Press, Washington, D.C., 2011; the full text can be accessed free of charge at http://www.nap.edu/catalog.php?record_id=12654). All chemical waste should be disposed of in accordance with local regulations. For general guidelines for the management of chemical waste, see Chapter 8 of Prudent Practices. In some articles in Organic Syntheses, chemical-specific hazards are highlighted in red “Caution Notes” within a procedure. It is important to recognize that the absence of a caution note does not imply that no significant hazards are associated with the chemicals involved in that procedure. Prior to performing a reaction, a thorough risk assessment should be carried out that includes a review of the potential hazards associated with each chemical and experimental operation on the scale that is planned for the procedure. Guidelines for carrying out a risk assessment and for analyzing the hazards associated with chemicals can be found in Chapter 4 of Prudent Practices. The procedures described in Organic Syntheses are provided as published and are conducted at one's own risk. Organic Syntheses, Inc., its Editors, and its Board of Directors do not warrant or guarantee the safety of individuals using these procedures and hereby disclaim any liability for any injuries or damages claimed to have resulted from or related in any way to the procedures herein. -
Template COVID-19
PAHO Does Not Recommend Taking Products that Contain Chlorine Dioxide, Sodium Chlorite, Sodium Hypochlorite, or Derivatives 16 July 2020 The information included in this note reflects the available evidence at the date of publication. KEY MESSAGES • The Pan American Health Organization (PAHO) does not recommend oral or parenteral use of chlorine dioxide or sodium chlorite-based products for patients with suspected or diagnosed COVID-19 or for anyone else. There is no evidence of their effectiveness and the ingestion or inhalation of such products could cause serious adverse effects. • People’s safety should be the main objective of any health decision or intervention. • PAHO recommends strengthened reporting to the national drug regulatory authority or to the office of the Ministry of Health responsible for drug regulation in the event of any adverse event linked to the use of these products. PAHO also recommends that products containing chlorine dioxide, chlorine derivatives, or any other substance presented as a treatment for COVID-19 should be reported. • The health authorities should monitor media marketing of products claiming to be therapies for COVID-19 in order to take the appropriate actions. Information on the subject Context • Chlorine dioxide is a yellow or reddish-yellow gas used as bleach in paper manufacturing, in public water treatment plants, and for the decontamination of buildings. Chlorine dioxide reacts with water to generate chlorite ions. Both chemical species are highly reactive, which means that they have capacity to eliminate bacteria and other microorganisms in aqueous media (Agency for Toxic Substances and Disease Registry [ATSDR], 2004). • This gas has been used as a disinfectant in low concentrations for the treatment of water (WHO: 2008, 2016) and in clinical trials for buccal antisepsis (National Library of Medicine, 2020). -
Sodium Chlorite Neutralization
® Basic Chemicals Sodium Chlorite Neutralization Introduction that this reaction is exothermic and liberates a If sodium chlorite is spilled or becomes a waste, significant amount of heat (H). it must be disposed of in accordance with local, state, and Federal regulations by a NPDES NaClO2 + 2Na2SO3 2Na2SO4 + NaCl permitted out-fall or in a permitted hazardous 90.45g + 2(126.04g) 2(142.04g) + 58.44g waste treatment, storage, and disposal facility. H = -168 kcal/mole NaClO2 Due to the reactivity of sodium chlorite, neutralization for disposal purposes should be For example, when starting with a 5% NaClO2 avoided whenever possible. Where permitted, solution, the heat generated from this reaction the preferred method for handling sodium could theoretically raise the temperature of the chlorite spills and waste is by dilution, as solution by 81C (146F). Adequate dilution, discussed in the OxyChem Safety Data Sheet thorough mixing and a slow rate of reaction are (SDS) for sodium chlorite in Section 6, important factors in controlling the temperature (Accidental Release Measures). Sodium chlorite increase (T). neutralization procedures must be carried out only by properly trained personnel wearing Procedure appropriate protective equipment. The complete neutralization procedure involves three sequential steps: dilution, chlorite Reaction Considerations reduction, and alkali neutralization. The dilution If a specific situation requires sodium chlorite to step lowers the strength of the sodium chlorite be neutralized, the chlorite must first be reduced solution to 5% or less; the reduction step reacts by a reaction with sodium sulfite. The use of the diluted chlorite solution with sodium sulfite to sodium sulfite is recommended over other produce a sulfate solution, and the neutralization reducing agents such as sodium thiosulfate step reduces the pH of the alkaline sulfate (Na2S2O3), sodium bisulfite (NaHSO3), and solution from approximately 12 to 4-5. -
Guidelines for Drinking-Water Quality, Fourth Edition
12. CHEMICAL FACT SHEETS Assessment date 1993 Principal reference WHO (2003) Chlorine in drinking-water In humans and experimental animals exposed to chlorine in drinking-water, no specific adverse treatment-related effects have been observed. IARC has classified h ypochlorite in Group 3 (not classifiable as to its carcinogenicity to humans). Chlorite and chlorate Chlorite and chlorate are disinfection by-products resulting from the use of chlorine dioxide as a disinfectant and for odour and taste control in water. Chlorine dioxide is also used as a bleaching agent for cellulose, paper pulp, flour and oils. Sodium chlorite and sodium chlorate are both used in the production of chlorine dioxide as well as for other commercial purposes. Chlorine dioxide rapidly decomposes into chlorite, chlorate and chloride ions in treated water, chlorite being the predominant species; this reaction is favoured by alkaline conditions. The major route of environmental ex- posure to chlorine dioxide, sodium chlorite and sodium chlorate is through drinking- water. Chlorate is also formed in sodium hypochlorite solution that is stored for long periods, particularly at high ambient temperatures. Provisional guideline values Chlorite: 0.7 mg/l (700 µg/l) Chlorate: 0.7 mg/l (700 µg/l) The guideline values for chlorite and chlorate are designated as provisional because use of chlorine dioxide as a disinfectant may result in the chlorite and chlorate guideline values being exceeded, and difficulties in meeting the guideline value must never be a reason for compromising adequate disinfection. Occurrence Levels of chlorite in water reported in one study ranged from 3.2 to 7.0 mg/l; however, the combined levels will not exceed the dose of chlorine dioxide applied. -
Press Release
Press release Medicines Control Council warns against the use of the unregistered medicine, Miracle Mineral Solution (MMS) and similar products for the treatment of medical conditions Date: 15 May 2016 At its 77th meeting on 21-22 April 2016, the Medicines Control Council (MCC) expressed their concern over the use of an unregistered medicine sold as Miracle Mineral Solution (MMS) by the public. Miracle Mineral Solution (MMS) has been claimed to be effective in the treatment of various medical conditions, including HIV/AIDS, cancer, autism, type 1 and type 2 diabetes mellitus. It is claimed that Miracle Mineral Solution (MMS) can remove impurities from the body. Miracle Mineral Solution (MMS) is allegedly sold by the Genesis II Church, using a pyramid-type marketing and distribution scheme. What is Miracle Mineral Solution (MMS)? Miracle Mineral Solution (MMS) is presented as two separate bottles, one purporting to contain a mixture of herbs and sodium chlorite, and the second purporting to contain citric acid. In accordance with the directions for use, when the two solutions are mixed, chlorine is released. The manufacturer, sellers and distributors claim that the released chlorine will target the patient’s affected cells (such as those cells affected by HIV or cancer) and remove those cells from the body. Sodium chlorite (not to be confused with table salt – sodium chloride) is commonly used as a bleach. It is included in disinfectants or bleaching agents for domestic use. It is also used to control slime and bacterial formation in water systems used, such as at power plants, pulp and paper mills. -
Acidified Sodium Chlorite
Acidified Sodium Chlorite Livestock 1 2 Identification of Petitioned Substance 3 4 Chemical Name: 11 CAS Numbers: 5 Acidified Sodium Chlorite (ASC) 13898-47-0 (Chlorous Acid) 6 7758-19-2 (Sodium Chlorite) 7 Other Names: 8 Sodium Chlorite, Acidified Other Codes: 9 Chlorous Acid 231-836-6 (EINECS) 10 12 Trade Names: 13 SANOVA®, 4XLA®, Aztec Gold® 14 15 Summary of Petitioned Use 16 The National Organic Program (NOP) final rule currently allows the use of acidified sodium chlorite (ASC) 17 solutions for antimicrobial food treatment when acidified with citric acid under 7 CFR § 205.605. The 18 petition before the National Organic Standards Board (NOSB) is to add ASC solution as an allowed 19 synthetic in organic livestock production (§ 205.603) for use as a disinfectant/sanitizer and topical 20 treatment (i.e., teat dip). 21 ASC solutions used as disinfectants and teat dip treatments in livestock production are analogous to those 22 used for secondary direct food processing and handling. However, the potential impacts to the 23 environment and human health resulting from ASC treatments of livestock necessitate consideration of the 24 aqueous chemistry of the parent substance and its breakdown products, and potential for toxic effects to 25 terrestrial organisms and humans potentially exposed to these substances. 26 Characterization of Petitioned Substance 27 28 Composition of the Substance: 29 The petitioned substance, acidified sodium chlorite (ASC) solution, is generated through the reaction of 30 any acid categorized as Generally Recognized as Safe (GRAS) by the FDA with an aqueous solution of 31 technical grade (~80% purity) sodium chlorite (NaClO2). -
TEMPO/Naclo2/Naocl Oxidation of Arabinoxylans
Carbohydrate Polymers 259 (2021) 117781 Contents lists available at ScienceDirect Carbohydrate Polymers journal homepage: www.elsevier.com/locate/carbpol TEMPO/NaClO2/NaOCl oxidation of arabinoxylans Carolina O. Pandeirada a, Donny W.H. Merkx a,b, Hans-Gerd Janssen b,c, Yvonne Westphal b, Henk A. Schols a,* a Wageningen University & Research, Laboratory of Food Chemistry, P.O. Box 17, 6700 AA Wageningen, the Netherlands b Unilever Foods Innovation Centre – Hive, Bronland 14, 6708 WH Wageningen, the Netherlands c Wageningen University & Research, Laboratory of Organic Chemistry, P.O. Box 8026, 6700 EG Wageningen, the Netherlands ARTICLE INFO ABSTRACT Keywords: TEMPO-oxidation of neutral polysaccharides has been used to obtain polyuronides displaying improved func Arabinoxylan tional properties. Although arabinoxylans (AX) from different sources may yield polyuronides with diverse TEMPO-oxidation properties due to their variable arabinose (Araf) substitution patterns, information of the TEMPO-oxidation of AX Arabinuronoxylan on its structure remains scarce. We oxidized AX using various TEMPO:NaClO2:NaOCl ratios. A TEMPO:NaClO2: Arabinuronic acid NaOCl ratio of 1.0:2.6:0.4 per mol of Ara gave an oxidized-AX with high molecular weight, minimal effect on xylose appearance, and comprising charged side chains. Although NMR analyses unveiled arabinuronic acid (AraAf) as the only oxidation product in the oxidized-AX, accurate AraA quantification is still challenging. Linkage analysis showed that > 75 % of the β-(1→4)-xylan backbone remained single-substituted at position O-3 of Xyl similarly to native AX. TEMPO-oxidation of AX can be considered a promising approach to obtain ara binuronoxylans with a substitution pattern resembling its parental AX. -
Toxicological Profile for Chlorine Dioxide and Chlorite
TOXICOLOGICAL PROFILE FOR CHLORINE DIOXIDE AND CHLORITE U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Public Health Service Agency for Toxic Substances and Disease Registry September 2004 CHLORINE DIOXIDE AND CHLORITE ii DISCLAIMER The use of company or product name(s) is for identification only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry. CHLORINE DIOXIDE AND CHLORITE iii UPDATE STATEMENT Toxicological Profile for Chlorine Dioxide and Chlorite, Draft for Public Comment was released in September 2002. This edition supersedes any previously released draft or final profile. Toxicological profiles are revised and republished as necessary. For information regarding the update status of previously released profiles, contact ATSDR at: Agency for Toxic Substances and Disease Registry Division of Toxicology/Toxicology Information Branch 1600 Clifton Road NE, Mailstop F-32 Atlanta, Georgia 30333 CHLORINE DIOXIDE AND CHLORITE vi *Legislative Background The toxicological profiles are developed in response to the Superfund Amendments and Reauthorization Act (SARA) of 1986 (Public law 99-499) which amended the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA or Superfund). This public law directed ATSDR to prepare toxicological profiles for hazardous substances most commonly found at facilities on the CERCLA National Priorities List and that pose the most significant potential threat to human health, as determined by ATSDR and the EPA. The availability of the revised priority list of 275 hazardous substances was announced in the Federal Register on November 17, 1997 (62 FR 61332). For prior versions of the list of substances, see Federal Register notices dated April 29, 1996 (61 FR 18744); April 17, 1987 (52 FR 12866); October 20, 1988 (53 FR 41280); October 26, 1989 (54 FR 43619); October 17, 1990 (55 FR 42067); October 17, 1991 (56 FR 52166); October 28, 1992 (57 FR 48801); and February 28, 1994 (59 FR 9486). -
Kinetics of the Preparation of Chlorine Dioxide by Sodium Chlorite
49 A publication of CHEMICAL ENGINEERING TRANSACTIONS VOL. 46, 2015 The Italian Association of Chemical Engineering Online at www.aidic.it/cet Guest Editors: Peiyu Ren, Yancang Li, Huiping Song Copyright © 2015, AIDIC Servizi S.r.l., ISBN 978-88-95608-37-2; ISSN 2283-9216 DOI: 10.3303/CET1546009 Kinetics of the Preparation of Chlorine Dioxide by Sodium Chlorite and Hydrochloric Acid at Low Concentration a a b Zhengbo Mo* , Songtao Hu , Dedong Hu aQingdao Technological University,. 11, Fushun Rd, Shibei,Qingdao, Shandong,China; bQingdao University of Science and Technology, 99 Songling Rd, Laoshan, Qingdao, Shandong, China. [email protected] The kinetics of the reaction between sodium chlorite and hydrochloric acid is studied at various temperatures and molar concentrations of chlorite and acid at low concentrations. The reaction rate law is established, and macrokinetics formula is obtained. Reaction has been found 1 and 1.39 order with respect to chlorite and hydrochloric acid respectively when preparing chloride dioxide using low concentrations of sodium chlorite and hydrochloric acid. The temperature dependence of the reaction is also investigated and pre-exponential Arrhenius parameter as well as activation energy are determined. 1. Introduction Chloride dioxide (ClO2) is usually used as an oxidant for pulp bleaching and disinfection. For its application in water treatment, chloride dioxide can achieve a good disinfection effect without producing chlorinated organic matters such as trihalomethanes (THMs) and chlorophenol that are carcinogens or mutagens, which was reported by Yu and Zhang (2012). Under normal temperature, chloride dioxide exists as a gas that has an excellent antibacterial and disinfection effect on a variety of microorganisms. -
Sids Initial Assessment Profile
SIAM 23, 17-20 October 2006 BIAC/ICCA SIDS INITIAL ASSESSMENT PROFILE Sodium chlorite 7758-19-2 CAS No. Chlorine dioxide 10049-04-4 Chemical Name Category Sodium chlorite and chlorine dioxide Sodium chlorite Na ClO2 Molecular Formula Chlorine dioxide ClO2 SUMMARY CONCLUSIONS OF THE SIAR Category justification Chlorine dioxide and sodium chlorite are characterized together in this dossier because studies conducted with chlorite, the predominant reduction product of chlorine dioxide, are considered to be relevant in characterizing the toxicity of chlorine dioxide. In addition, studies conducted with chlorine dioxide may be relevant to characterize the toxicity of chlorite. Chlorine dioxide is fairly unstable and dissociates predominantly into - - - chlorite (ClO2 ) and chloride (Cl ), and to a lesser extent, chlorate (ClO3 ). There is a ready interconversion among these species in both water and the human gut. Therefore, what exists in water or the body is a mixture of these chemical species. Toxicity information on sodium chlorite is also relevant and appropriate for assessing the effects of chlorine dioxide in man and the environment and vice versa. This category approach does not take into account local effects that would occur by dermal or inhalation exposure as they are specific to each substance. Human Health Both sodium chlorite and chlorine dioxide are rapidly absorbed following ingestion with chlorine dioxide being converted into chlorite and chloride ions with chlorate as a minor by-product. This document may only be reproduced integrally. The conclusions and recommendations (and their rationale) in this document are intended to be mutually supportive, and should be understood and interpreted together. -
Sodium Chlorite for the Generation of Chlorine Dioxide Gas - Petitioned
Formal Recommendation From: National Organic Standards Board (NOSB) To: National Organic Program (NOP) Date: October 26, 2018 Subject: Sodium chlorite for the generation of chlorine dioxide gas - petitioned NOSB Chair: Tom Chapman The NOSB hereby recommends to the NOP the following: Rulemaking Action: None Statement of the Recommendation: The NOSB does not recommend sodium chlorite for the generation of chlorine dioxide gas be added to the National List at §205.605(b). Rationale Supporting Recommendation: The NOSB noted the availability of allowed natural and synthetic alternatives to this substance. The Board recognized the importance of having the ability to rotate among several materials in an antimicrobial regime to reduce the incidence of microbial resistance. However, in the absence of public comment advocating for the addition of sodium chlorite for the generation of chlorine dioxide gas to the National List and the availability of alternatives, the NOSB determined it is not essential to organic production. NOSB Vote: Classification Motion: Motion to classify sodium chlorite for the generation of chlorine dioxide gas as nonagricultural, synthetic (Classified in April 2016) Motion by: Scott Rice Seconded by: Jean Richardson Yes: 7 No: 0 Abstain: 0 Absent: 1 Recuse: 0 Listing Motion: Motion to add sodium chlorite for the generation of chlorine dioxide gas at §205.605(b) Motion by: Scott Rice Seconded by: Lisa de Lima Yes: 6 No: 9 Abstain: 0 Absent: 0 Recuse: 0 Outcome: Motion Failed National Organic Standards Board Handling Subcommittee -
Stabilized Chlorine Dioxide in Fuel Ethanol Fermentation: Efficacy, Mechanisms and Residuals
Stabilized Chlorine Dioxide in Fuel Ethanol Fermentation: Efficacy, Mechanisms and Residuals Derrick Okull, PhD Technical Service Manager Dupont Nutrition and Biosciences Additives Stabilized Chlorine Dioxide (ClO2) – What is it? Property Value/Description NOT chlorine/bleach Buffered sodium chlorite solution, antibiotic-free aqueous Crystallization Point -12°C 10°F solution Historically used in food processing/water treatment FreezingPoint -18°C 0°F industries for contamination control/sanitation Boiling Point 106°C 223°F 14yr history in fuel ethanol – GRAS status, with expert concurrence, for use as a processing aid in potable alcohol pH 9.5 to 9.8 and fuel ethanol production with resulting distillers’ grains approved for use in animal feed (cattle, swine, poultry). Density (g/mL) 1.18 to 1.21 Controls lactic and acetic acid producing bacterial @ 20 °C contamination Color Clear lightyellow solution Suitable for ethanol production from sugar and/or grain substrates Odor Faint chlorine-like smell Generated, concentrated solutions traditionally used in paper bleaching Copyright @ 2019 Dupont All Rights Reserved Additives Stabilized Chlorine Dioxide – how it works A solution of 15 – 25 % Sodium Chlorite Chlorine dioxide is formed under acidic pH conditions When applied correctly, inactivates bacteria without harming yeast Activity is pH dependent – Need pH < 5.4 to be effective Chlorite + Acid Chlorous acid + Chlorine dioxide - + ClO2 + H HClO2 + ClO2 Chlorite + Low pH mash/other substrate Low pH/Acidic conditions drive conversion