sec-Butyllithium is an organic compound with the formula C₄H₉Li, and its IUPAC name is the same with the product name. With the CAS registry number 598-30-1, it is also named as (1-Methylpropyl)lithium. What's more, its systematic name is Butan-2-yllithium. It belongs to the product categories of Straight Chain Compounds; Metal Alkyl. Its EINECS number is 209-927-7. In addition, the molecular weight is 64.06. This chemical is sensitive to air and water. The product should be sealed and stored in nitrogen-filled containers which are placed at the temperature of 4 °C. It is used as lithium reagent, and it is also used in the polymerization of isoprene and butadiene.

Preparation: this chemical can be prepared by the reaction of sec-butyl halides with lithium metal.

CH₃CHClCH₂CH₃ + 2 Li → CH₃CHLiCH₂CH₃ + LiCl

Uses of sec-Butyllithium: it can be used to produce 2-methyl-1-phenyl-butan-1-one at the temperature of 0 - 25 °C. It will need solvent tetrahydrofuran with the reaction time of 2 hours. The yield is about 81%.

When you are using this chemical, please be cautious about it as the following:
This chemical is highly flammable, so you should keep it away from sources of ignition - No smoking. It is spontaneously flammable in air and can cause burns. Moreover, if contact with water, it will liberate extremely flammable gases. This substance is very toxic to aquatic organisms as it may cause long-term adverse effects in the aquatic environment. What's more, it is harmful as it may cause lung damage if swallowed. Repeated exposure may cause skin dryness or cracking and its vapours may cause drowsiness and dizziness. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need to wear suitable protective clothing, gloves and eye/face protection. You must take precautionary measures against static discharges. In case of fire use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add - Never use water). In case of accident or if you feel unwell, you should seek medical advice immediately (show the label where possible). This material and its container must be disposed of as hazardous waste. You must avoid releasing it to the environment, and you need to refer to special instructions/safety data sheet. If swallowed, it will not induce vomiting, but you must seek medical advice immediately and show this container or label.

You can still convert the following datas into molecular structure:
(1)SMILES: CC([Li])CC
(2)Std. InChI: InChI=1S/C4H9.Li/c1-3-4-2;/h3H,4H2,1-2H3;
(3)Std. InChIKey: VATDYQWILMGLEW-UHFFFAOYSA-N