Copper sulfate is blue and odorless. It gives off moisture when exposed to air ( 22 ). Copper sulfate is classified for shipping purposes as a hazardous substance or hazardous waste. It may pose unreasonable risk to health, safety, or property, when transported ( 13 ). Copper sulfate is highly corrosive to plain steel, iron and galvanized pipes. All metal in contact with solutions of this material should be 304 stainless steel, monel or plastic ( 6 ). It should not be stored in metal containers. Copper sulfate is also incompatible with acetylene gas and with magnesium metal ( 13 ). Containers of this material should be kept tightly sealed ( 20 ). It is indefinitely stable when kept dry and is stable to heat, cold, or light ( 19 ). However, there is slight decomposition of copper sulfate at temperatures above 200 degrees C. Above 400 degrees C, it decomposes, giving off sulfur trioxide gas ( 13 ).
MetLife has become aware of a recent phishing attack against some of our customers. ‘Phishing’ is a fraudulent attempt to obtain an individual’s personal information, often through a misleading email, text or other online communication. Keeping your personal information secure is a top priority of MetLife. That's why we encourage you to take precautions to protect your personal data, and why we do not ask you to verify your personal or account information by email, text message or online. If you suspect you received a phishing email, please forward it to: phish@. Delete the email after you forward it, and do not click on any links it contains. If you believe you entered information into a linked website, change your login information immediately. For helpful hints to protect your personal information, visit the following website: https:///articles/0003-phishing
Restoring Column Performance
The procedures listed below may restore the performance of a column that has become fouled, but the procedures will not improve the performance of a column that is damaged or beyond its useful life. Nor can all stationary phases be restored. The unique supports in PRP-X500 and PRP-X600 columns make it impossible to restore performance with a washing procedure. For technical assistance regarding these columns, please Contact HPLC Support. NOTE: Before performing a restoration procedure, always make sure that the mobile phases are miscible and that precipitation will not occur. If necessary, wash the column with a suitable intermediate solvent before changing over to the new mobile phase. A minimum of five column volumes of intermediate solvent should be used.
Column Restoration Procedures
Follow the appropriate restoration procedure listed below using a flow rate of or mL/min. unless otherwise specified. Evaluate column performance using the test mix and conditions listed on the Performance Test Report shipped with each column.