Re: Usage of chemistry abbreviation for Normal (N)

Subject: Re: Usage of chemistry abbreviation for Normal (N)
From: Thorsten Konersmann <tk -at- documentation -dot- engineering>
To: Emoto <emoto1 -at- gmail -dot- com>
Date: Thu, 3 Sep 2020 23:54:51 +0200

The 8th edition of the CSE manual has no specific rule on normality (aka
equivalent concentration). But the general rules in section 12.1.4.1 on
ânumbers combined with units of measure or symbolsâ cover it in my view.


The section refers to alphabetical and nonalphabetical symbols in general,
not only to units of measure.


Section 12.1.4.1 has four rules, which I paraphrase:

1. Use a space between a number and an *alphabetical* symbol, eg, 130 mm.
2. Do not use a space between a number and a *nonalphabetical* symbol,
eg, $98, 44%. There are exceptions to this rule, eg, 12 ÂC.

Rule 3 is about geographic coordinates and rule 4 about when to spell out
numbers.


Regarding your example, itâs â0.2 N NaOHâ with a space then, following the
rule 1 in section 12.1.4.1.

Emoto <emoto1 -at- gmail -dot- com> schrieb am Do. 3. Sept. 2020 um 19:43:

> Hi,
>
>
>
> Can someone point me toward an authoritative source for usage of the N that
>
> is short for normal? Is there a space between the N and its number value?
>
>
>
> For example:
>
>
>
> 0.2N NaOH
>
>
>
> or
>
>
>
> 0.2 N NaOH
>
>
>
> I'm working on a bunch of docs that have this in them and would like to
>
> make them all consistent, and would like to base my decision on more than
>
> what looks good to me. I like the space in front of the N, but would
>
> happily bow to some higher authority.
>
>
>
> Thanks,
>
>
>
> Bob
>
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References:
Usage of chemistry abbreviation for Normal (N): From: Emoto

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