Greetings all,

Please forgive the cross posting. I just had a standardization set for turbidity instrument show up for waste. They are Sargent-Welch Turbidity Standards and were purchased in 1986. The ampules are still sealed and labeled with their NTU value, but nothing else. The box also states that ampules were calibrated against Formazin Polymer reference suspensions prepared according to EPA and APHA methods.

A formazine suspension is made by mixing solutions of 5 g/L hydrazine sulfate and 50 g/L hexamethylenetetramine is what I have found in my research into these ampules.

Would I be correct in an assumption of the Formazine being the component of the material? Would any of you happen to have an MSDS for this?

I want to ensure that I classify the material correctly for disposal.

Thank you,

Margaret Smallbrock

Campus Environmental Health and Safety Manager

Environmental Health & Safety

South Dakota School of Mines

501 East St. Joseph Street

Rapid City, SD 57701-3995

605-394-6020

605-394-5837 FAX

Margaret.Smallbrock**At_Symbol_Here**sdsmt.edu