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رقم التسجيل CAS (Info)


رقم تسجيل المركب الكيميائي (بالإنجليزية: CAS Registry Number)‏ حيث [CAS تشير إلى الأحرف الأولى من (Chemical Abstracts Service)] هو نظام عالمي لترقيم المركبات الكيميائية. يوجد لكل مركب كيميائي معروف (حتى السلاسل الحيوية، السبائك، البوليميرات) رقم تسجيل CAS محدد، مما يسهل من البحث والتعامل مع المواد الكيميائية خاصة بالنسبة لغير الكيميا.

الصيغة

يقسم رقم التسجيل CAS عن طريق علامة الوصل - إلى ثلاثة أقسام، الأول يتألف من عدة أرقام حتى إلى 7، الثاني من رقمين، أما الثالث فمن رقم واحد، ويدعى رقم اختبار Check digit.

يتم الاختبار وفق الصيغة:

حيث أن R هو رقم الاختبار، و تمثل الأرقام مرتبة في رقم التسجيل.

يكون رقم التسجيل CAS صحيحاً عندما

مثال

الإيثانول له رقم CAS كالتالي : 5-17-64

بحساب

ينتج لدينا أن الرقم صحيح.

Source: wikipedia.org
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Novels And Literary Stories Islamic Religion Human Development And Self-development History Islamic Fiqh Literature Interpretation Of The Koran Philosophy And Logic Islamic Faith The Culture Biographies, Translations And Life Of The Famous People Biography Of The Prophet Muhammad, May God Bless Him And Grant Him Peace Psychology Teaching English English Islamic Philosophy Arabic Literature Arabic Sciences Of The Noble Qur’an And The Sunnah Of The Prophet Political Science And Strategy History Acclamation The Holy Qur'an Engineering Poetry And Poets Education More of Book Categories

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