---
type: "codesystem"
title: "Substance Relationship Type"
codesystem: "substance-relationship-type"
---
# Substance Relationship Type

- **Official URL**: http://hl7.org/fhir/substance-relationship-type
- **Version**: 6.0.0
- **Status**: active
- **Name**: SubstanceRelationshipType
- **Title**: Substance Relationship Type
- **Publisher**: HL7 (FHIR Project)
- **Description**: The relationship between two substance types.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| Salt | Salt to parent |  |
| ActiveMoiety | Active moiety |  |
| StartingMaterial | Starting material for |  |
| Polymorph | Polymorph of |  |
| Impurity | Impurity of |  |

## CodeSystem XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="substance-relationship-type"/>
  <meta>
    <lastUpdated value="2021-01-05T10:01:24.148+11:00"/>
  </meta>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="brr"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="informative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1"/>
  </extension>
  <url value="http://hl7.org/fhir/substance-relationship-type"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.2088"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="SubstanceRelationshipType"/>
  <title value="Substance Relationship Type"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2021-01-05T10:01:24+11:00"/>
  <publisher value="HL7 (FHIR Project)"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="fhir@lists.hl7.org"/>
    </telecom>
  </contact>
  <description value="The relationship between two substance types."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/substance-relationship-type"/>
  <content value="complete"/>
  <concept>
    <code value="Salt"/>
    <display value="Salt to parent"/>
  </concept>
  <concept>
    <code value="ActiveMoiety"/>
    <display value="Active moiety"/>
  </concept>
  <concept>
    <code value="StartingMaterial"/>
    <display value="Starting material for"/>
  </concept>
  <concept>
    <code value="Polymorph"/>
    <display value="Polymorph of"/>
  </concept>
  <concept>
    <code value="Impurity"/>
    <display value="Impurity of"/>
  </concept>
</CodeSystem>
```