Hydrates and anhydrous substances

Modeling

Parent concept	Most distal appropriate descendant of 105590001 \|Substance (substance)\|
Semantic tag	(substance)
Definition status	Primitive
Attribute	738774007 \|Is modification of (attribute)\| relationship to the substance with unspecified hydration 726542003 \|Has disposition (attribute)\|, as appropriate

Hydrates

Hydates are modeled with an

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relationship to the substance with unspecified hydration.

For example,
- Ferrous oxalate dihydrate (substance) is modification of → Ferrous oxalate
- Caffeine hydrate (substance) is modification of → Caffeine
- Zinc sulfate heptahydrate (substance) is modification of → Zinc sulfate

Naming Guidelines

FSN

Pattern:

X hydrate (substance)
X dihydrate (substance)
X monohydrate (substance)

For example,

Copper sulfate pentahydrate (substance)

Preferred Term

Pattern:

X hydrate
X dihydrate
X monohydrate

For example,

Copper sulfate pentahydrate

Exemplar

The following illustrates the inferred view.

Caffeine hydrate (substance) IS MODIFICATION OF Caffeine (substance)

Anhydrous compounds

Anhydrous compounds have an

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relationship to the unspecified substance, i.e., where the level hydration is not specified.

For example,
- Sodium carbonate anhydrous (substance) is modification of → Sodium carbonate
- Theophylline anhydrous (substance) is modification of → Theophylline

Naming Guidelines

FSN

Pattern:

X anhydrous (substance)

For example,

Theophylline anhydrous (substance)

Preferred Term

Pattern:

X anhydrous

For example,

Theophylline anhydrous

Synonyms

Anhydrous X

Exemplar

The following illustrates the inferred view.

|Theophylline anhydrous (substance)| IS MODIFICATION OF |Theophylline (substance)|