Liquid-crystalline medium

A liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (Δ∈), which has a value for the ratio γ1/Δn2 in the range 6-45 Pa·s with a clearing point of >60° C. and a Δ∈ of ≦−2.3, and comprises

• a compound of formula B-4
• in which
• alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-6 C atoms;
• at least one compound selected from the following group of compounds
• in which
• alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-6 C atoms
• and at least two compounds of the formulae IA, IB and/or II
• in which
• R1 and R2 each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which one or more CH2 groups are each, independently of one another, optionally replaced by —O—, —S—,
• —C≡C—, —CF2O—, —CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another, and
• v denotes 1 to 6.