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 738774007 | Is modification of (attribute)| 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

FSN

Pattern:

• X hydrate (substance)

• X dihydrate (substance)

• X monohydrate (substance)

For example,

• Copper sulfate pentahydrate (substance)

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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 738774007 | Is modification of (attribute)| 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)

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Preferred Term

Pattern:

• X anhydrous

For example,

• Theophylline anhydrous

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Synonyms

Anhydrous X

Exemplar

The following illustrates the inferred view.

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

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