| abstract |
(57) Abstract: A liquid crystal mixture having a predetermined specific resistance is provided. A substance whose specific resistance of the liquid crystal is reproducibly adjusted is selected or provided. A compound of formula I at a concentration of 10 ppm to 10%. (Where A 1 , A 2 , Z 1 , Z 2 , R, R ′, m, n, a liquid crystal mixture having a specific specific resistance comprising an acidic compound of (o, X, Y, p 1 , p 2 , q 1 and q 2 are as defined in the specification). |