Description Hazardous Shipping Fees:This product may incur an additional hazardous shipping fee. We will pack the products to minimize all shipping costs, and the final charge will reflect the shipping cost and any applicable hazardous fees charged by FedEx.Catalog Number:EC-503Size: 25 mlN,N,N’,N’ – tetramethylethylene diamineFractionally distilled to remove all trace metals and amine impurities. Stored under nitrogen.Molecular WeightPurity116.21≥ 99%Refractive IndexBoiling Range1.1480 ± 0.001119-121o