r_und_s – Chemical hazard codes

The r_und_s pack­age de­codes the ger­man ‘R- und S-Sätze’, which are nu­mer­i­cally coded se­cu­rity ad­vice for chem­i­cal sub­stances into plain text. This is, e.g., used to com­pose se­cu­rity sheets or lab pro­to­cols and es­pe­cially use­ful for stu­dents of chem­istry.
There are four pack­ages, giv­ing texts in Ger­man, English, French and Dutch.