Difference between revisions of "Sodium hypochlorite"
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== Description == | == Description == | ||
| − | Light green crystals that react with [ | + | Light green crystals that react with [[carbon%20dioxide|carbon dioxide]] in the air. Sodium chlorite is used industrially for [[bleaching%20agent|bleaching]] [[paper%20pulp|paper pulp]] and [[textile|textiles]]. Household bleach is a 5% aqueous solution of sodium hypochlorite ([[Clorox|Clorox®]], Dazzle, eau de Labarraque, etc.). Commercially, bleach is commonly used as a [[disinfectant|disinfectant]] and [[fungicide|fungicide]]. Sodium hypochlorite is rarely used in conservation, however, because it can leave residual [[chlorine|chlorine]] compounds. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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sodium oxychloride; sodium chloride oxide; chlorinated soda; soda bleach; Clorox; Dazzle; eau de Labarraque; sodium hypochloride (sp) | sodium oxychloride; sodium chloride oxide; chlorinated soda; soda bleach; Clorox; Dazzle; eau de Labarraque; sodium hypochloride (sp) | ||
| − | + | == Risks == | |
| − | == | + | * Toxic by ingestion. Strongly irritating to skin and lungs. Toxic chlorine gas forms when mixed with ammonia. Very strong oxidizing agent. Fire risk in contact with dry organic materials. |
| + | * ThermoFisher: [https://beta-static.fishersci.com/content/dam/fishersci/en_US/documents/programs/education/regulatory-documents/sds/chemicals/chemicals-s/S25552.pdf SDS] | ||
| + | == Physical and Chemical Properties == | ||
Soluble in cold water. Decomposes in hot water. | Soluble in cold water. Decomposes in hot water. | ||
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|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 18 | + | | 18 C |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | == Resources and Citations == |
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* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979 | * Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979 | ||
Latest revision as of 09:04, 2 June 2022
Description
Light green crystals that react with Carbon dioxide in the air. Sodium chlorite is used industrially for bleaching Paper pulp and textiles. Household bleach is a 5% aqueous solution of sodium hypochlorite (Clorox®, Dazzle, eau de Labarraque, etc.). Commercially, bleach is commonly used as a Disinfectant and Fungicide. Sodium hypochlorite is rarely used in conservation, however, because it can leave residual Chlorine compounds.
Synonyms and Related Terms
sodium oxychloride; sodium chloride oxide; chlorinated soda; soda bleach; Clorox; Dazzle; eau de Labarraque; sodium hypochloride (sp)
Risks
- Toxic by ingestion. Strongly irritating to skin and lungs. Toxic chlorine gas forms when mixed with ammonia. Very strong oxidizing agent. Fire risk in contact with dry organic materials.
- ThermoFisher: SDS
Physical and Chemical Properties
Soluble in cold water. Decomposes in hot water.
| Composition | NaOCl - 5H2O |
|---|---|
| CAS | 7681-52-9 |
| Melting Point | 18 C |
| Molecular Weight | mol. wt. = 74.4 |
Resources and Citations
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
- A Glossary of Paper Conservation Terms, Margaret Ellis (ed.), Conservation Center of the Institute of Fine Arts, New York City, 1998
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 8773
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 681
- G.Caneva, M.P.Nugari, O.Salvadori, Biology in the Conservation of Works of Art, ICCROM, Rome, 1991
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993