HG/T 2765.4-2005: Blue gel indicator, color changing silica gel and non-cobalt color changing silica gel

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Scope

This standard specifies the requirements, test methods, inspection rules,
markings, labels, packaging, transportation, storage of blue gel indicator, color
changing silica gel, non-cobalt color changing silica gel.
This standard applies to blue gel indicator, color changing silica gel, non-cobalt
color changing silica gel, which is prepared, using the silica gel as the raw
materials, through impregnation with cobalt chloride. Blue gel indicator is mainly
used to indicate the degree of saturation of desiccant, the relative humidity of
the sealed package and the space medium in precision instruments. The color
changing silica gel is mainly used as a desiccant and indicator, which is used
to prevent moisture in general sealed packages and instruments. Non-cobalt
color changing silica gel can usually be used as a substitute for blue gel
indicator and color changing silica gel.

Basic Data

Standard ID	HG/T 2765.4-2005 (HG/T2765.4-2005)
Description (Translated English)	Blue gel indicator, color changing silica gel and non-cobalt color changing silica gel
Sector / Industry	Chemical Industry Standard (Recommended)
Classification of Chinese Standard	G13
Classification of International Standard	79.066.53
Word Count Estimation	5,563
Date of Issue	2005-07-10
Date of Implementation	2006-01-01
Older Standard (superseded by this standard)	HG/T 2765.4-1996
Quoted Standard	GB/T 191-2000; GB/T 1250; GB/T 4478; HG/T 2765.5-2005
Adopted Standard	�������� 8984-1975 (1991), NEQ
Regulation (derived from)	NDRC Notice No. 35 of 2005
Summary	This standard specifies the blue gel indicator, silica gel and silica gel without cobalt requirements, test methods, inspection rules and signs, labeling, packaging, transportation and storage. This standard applies to silica as a raw material, cobalt chloride and prepared dip blue gel indicator, silica gel and other process obtained cobalt- silica gel.