Difference between revisions of "Sodium sesquicarbonate"
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== Description == | == Description == | ||
| − | White, needle-shaped crystals. Sodium sesquicarbonate occurs in nature as [ | + | White, needle-shaped crystals. Sodium sesquicarbonate occurs in nature as [[trona|trona]]. It is generally used as a water softener and mildly alkaline cleaner. Sodium sesquicarbonate was recommended in the 1970s as a stabilization treatment of corroded bronze and iron objects. However, more recent examinations indicate that bronze pieces treated with sesquicarbonate are later susceptible to the formation of [[chalconatronite|chalconatronite]] corrosion products. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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urao; trona | urao; trona | ||
| − | == | + | == Risks == |
| + | |||
| + | * Skin contact causes irritation. | ||
| + | * Hill Brothers: [https://www.hillbrothers.com/pdf/downloads/msds/sds/n/sodium-sesquicarbonate-sds.pdf SDS] | ||
| + | |||
| + | == Physical and Chemical Properties == | ||
Soluble in water (pH = 10.1 for a 0.1 molar solution). | Soluble in water (pH = 10.1 for a 0.1 molar solution). | ||
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|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.112 | + | | 2.112 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
| − | + | * W.A.Oddy, M.J.Hughes "The Stabilization of Active Bronze and Iron Antiquities by the use of Sodium Sesquicarbonate" ''Studies in Conservation'', 15:183-189, 1970. | |
| − | + | * C. Horie, J.Vint, "Chalconatronite: A By-Product of Conservation?" ''Studies in Conservation'', 27:185-186, 1982. | |
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
Latest revision as of 09:44, 2 June 2022
Description
White, needle-shaped crystals. Sodium sesquicarbonate occurs in nature as Trona. It is generally used as a water softener and mildly alkaline cleaner. Sodium sesquicarbonate was recommended in the 1970s as a stabilization treatment of corroded bronze and iron objects. However, more recent examinations indicate that bronze pieces treated with sesquicarbonate are later susceptible to the formation of Chalconatronite corrosion products.
Synonyms and Related Terms
urao; trona
Risks
- Skin contact causes irritation.
- Hill Brothers: SDS
Physical and Chemical Properties
Soluble in water (pH = 10.1 for a 0.1 molar solution).
| Composition | Na2CO3-NaHCO3-2H2O |
|---|---|
| CAS | 553-96-0 |
| Density | 2.112 g/ml |
| Molecular Weight | mol. wt. = 190.0 |
Resources and Citations
- W.A.Oddy, M.J.Hughes "The Stabilization of Active Bronze and Iron Antiquities by the use of Sodium Sesquicarbonate" Studies in Conservation, 15:183-189, 1970.
- C. Horie, J.Vint, "Chalconatronite: A By-Product of Conservation?" Studies in Conservation, 27:185-186, 1982.
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8823