Seeing the current thread on "Help! Moldy Steinway D . . .", it reminded me of the following question. Are there any environmental concerns that we know of with the liquids that are being sold to be added to each fill-up of the water reservoir of piano humidifying systems? As I understand it, the water additive is used to prevent bacteria, mildew, and mold.
I did a quick search of the Web for the contents of the liquid additive treatments. If I captured it correctly, I found the following different types of labeled contents listed on the Web sites: (a) Active ingredient <1% of CAS #68424-85-1 (CAS being an American Chemical Society classification.). (b) Contains Benzyl-C12-18-alkyldimethyl ammonium chlorides. (c) Active Ingredients: Quaternary ammonium compounds, Benzyl-C8-18-alkyldimethyl compounds, chlorides. And lastly (d) A listing of both CAS 7732-18-5 and CAS 8030-78-2.
I then did a fast search on the Web for "Safety Data Sheets" (SDS), mainly for CAS 68424-85-1, and got some health and safety considerations. A couple examples are: (a) https://www.stepan.com/content/dam/stepan-dot-com/webdam/website-product-documents/safety-data-sheets/sds-us/en/00179500.pdf, (b) https://www.nucalgon.com/media/4794/4296-60_sds_eng_v1.pdf, (c) https://www.guidechem.com/msds/68424-85-1.html and (d) https://en.wikipedia.org/wiki/CAS_Registry_Number.
Regards, Norman
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Norman Brickman
Potomac Piano Service
Potomac, Maryland
potomacpiano@verizon.nethttps://potomacpiano.com(301) 983.9321
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