We 100% guarantee this is Kester RF741. And we only sell fresh product,from the latest batch from Kester. We receive a shipment every 2 weeks.
It all comes in this color. We sell it in 30cc syringes too, factory packed. The stock Kester photo shows it as clear, but it is always this yellow/brown color. We have about 12 factory-seаled tubes in refrigeration right now. We have never see it a lighter color, and we've sold 158 of the 30cc syringes this year and 212 of the re-packed syringes.
We can order a certificate of compliance, but there is a charge of $5 since this was a small order.