Topic : cas no. ผิดรูปแบบ
จากคุณ  :  อำนาจ (บ.พินชายน์ )   [ 10/26/2009 2:31:49 PM]
ทางบริษัทฯส่งหนังสือหารือไปแล้วทางกรมตอบกลับมาว่าcas no. ผิดรูปแบบ Chemical Zinc Stearate cas no.
557-05-01 ทางบริษัทตรวจดูใน Web แล้ว cas no.ดังกล่าวถูกต้อง จึงจะขอความอนุเคราะห์ช่วยแจ้งให้ทราบด้วยว่าถ้า cas no.ที่ถูกต้องเป็นตัวใด

จากคุณ : invalid CAS    [10/26/2009 3:41:58 PM]

Check Digit Verification of CAS Registry Numbers

A CAS Registry Number includes up to 10 digits which are separated into 3 groups by hyphens. The first part of the number, starting from the left, has up to 7 digits; the second part has 2 digits. The final part consists of a single check digit.

The check digit is developed by following a standard calculation shown below. Use it to see if you have a valid CAS Registry Number.


The CAS Registry Number may be written in a general form as:

N ......N N - N N - R
i 4 3 2 1

in which R represents the check digit and N represents a fundamental
sequential number. The check digit is derived from the following formula

iN + ... + 4N + 3N + 2N + 1N R
i 4 3 2 1
-------------------------------- = Q + --

10 10

in which Q represents an integer which is discarded.

For example, RN 107-07-3, the validity is checked as follows:

(5 x 1) + (4 x 0) + (3 x 7) + (2 x 0) + (1 x 7) 33 3
------------------------------------------------- = -- = 3 + ----
10 10 10

Q = 3 is discarded and R (the check digit) = 3Updated: 8/9/2007 2:58:12 PM

จากคุณ : BoonShoe    [10/26/2009 9:42:56 PM]

557-05-1 จึงจะถูก ข้างต้น 0 เกินมาจ้า..

จากคุณ : ppst    [25/10/2560 13:11:20]

on the wits, and withal just as good riding, just as careful horsemastership, and just as much self-sacrifice, audacity, and dash. I shall prove this up to the hilt by direct illustration from modern wars; but is it not self-evident? For here are men vested with the offensive and defensive power of Infantry, together with a mobility which is several times that of Infantry. Infantry have plenty to do to become good at their trade. How imperious and exacting must be the demands upon mounted infantry! I have slipped into one of the conventional definitions. Let us give it capitals, and ask how the fire-duties of Cavalry differ essentially from those of Mounted Infantry, or any other category of mounted riflemen?

Fog hangs heavy on that most pertinent inquiry. But the answer, of course, is that there is no difference whatever. And it follows necessarily that, however seldom or often fire-duties may be required of Cavalry, Cavalry will be excelled by mounted riflemen in the performance of those duties, just as they will be excelled in shock by troops who have more practice in shock. In either sphere the hybrid type must succumb to the pure type, and the moral is all the easier to see and enforce because the pure type of mounted rifleman, however arbitrary and fanciful the limits assigned to its utility, is actually and officially recognized at this moment, whereas no such thing as a pure type of shock horseman exists.

Nor is it only a case of competition with other mounted riflemen or other hybrid Cavalry. Let the reader extract from “Cavalry Training,” tabulate, and analyze all the 44fire-duties now theoretically allotted to Cavalry. It will take some little trouble, because they are not marshalled compactly or given the emphasis they deserve. He will find that they cover almost the entire range of war, and it goes without saying that in every one of these duties the trooper must be prepared to fight approximately as well as the riflemen opposed to him, whether they be Infantry or mounted men. Otherwise he will fail. Troops cannot be manipulated in war so that each class meets only its corresponding type. Each class must be prepared to meet any other, both in defence and offence. I am not constructing an academical dilemma, but a dilemma forced upon us by the facts of modern war. Bernhardi sees it clearly, and goes much farther, accordingly, than “Cavalry Training” dares go, in postulating that utterly unattainable perfection in both weapons which is the only way out of the dilemma. More on that point later.

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