National identification number "Teudat Zehut"), bearing an Identity Number, is issued to all residents over 16 years old who have legal temporary or permanent residence status, including non-citizens. Japan's national identification number system, known within the country as "My Number" (Japanese: マイナンバー), went into effect from 2016. The number consists of 12 digits, and one is assigned to each resident of Japan, including non-Japanese long-term residents with valid residency permits. In Kazakhstan there is a 12-digit Individual Identification Number for natural persons (abbreviated in , "ZhSN"; in , "IIN", with first six digits representing person's date of birth in the YYMMDD format) and
Polystyrene the chains from aligning with sufficient regularity to achieve any crystallinity. The plastic has a glass transition temperature "T" of ~90 °C. Polymerisation is initiated with free radicals. Ziegler–Natta polymerization can produce an ordered "syndiotactic" polystyrene with the phenyl groups positioned on alternating sides of the hydrocarbon backbone. This form is highly crystalline with a "T" of . Syndiotactic polystyrene resin is currently produced under the trade name XAREC by Idemitsu corporation, who use a metallocene catalyst for the polymerisation reaction. Polystyrene is chemically very inert, being resistant to acids and bases but is easily dissolved by many chlorinated solvents,