Inquiry (采购产品): expiration date on reagents I am a teacher at Polytech High School in Woodside De. I use your kits to teach my students about water quality and how to properly maintain the growing conditios for our fish each year. I would like to know how to tell whether my reagents are outdated. I was told that I can do this by looking at the lot number. If so, please instruct me on how to read the lot number for the expiration date. Thank you. Susan Wujtewicz **** Hidden Message ***** Susan Wujtewicz 823 Walnut Shade Rd. Woodside, DE 19980 USA Company: Polytech High School Title: Environmental Science Teacher Phone: 302-697-3255 ext 312 E-mail: swujtewi@polytech.k12.de.us **** Hidden Message ***** swujtewi@polytech.k12.de.us
