Assent Materials Declaration Tool: Key Terms

Article: Describes whether the product or sub-product stands alone as a shippable entity; this term is specific to the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) Regulation and describes the lowest level at which a substance exceedance is expressed.

Authorized Representative: An official person of authority regarding the data present in the declaration (can be the same as the company contact).

Bill of Materials: The Bill of Materials (BoM) is a comprehensive list of materials or components of a product that can include a shopping list and instructions on how to assemble the product.

Chemical Abstract Service Number: The Chemical Abstract Service (CAS) number is unique to one substance. A CAS Registry Number includes up to 10 digits that are separated into three groups by hyphens. The first part of the number, starting from the left, has 2-7 digits; the second part has two digits. The final part consists of a single check digit. It is possible to have no CAS number, which means the substance is not found in any of the Chemical Abstract Service databases.

Class A Declaration: Provides an answer to a query statement. Each query is a statement with a response of true or false. A Class A declaration may contain more than one query list.

Class C Declaration: Reports a summary of substance types within a product based on existing substance category lists or a custom list defined by the requestor or the supplier. For each substance above the defined threshold, users indicate the mass and mass percent of the substance in the product.

Class D Declaration: As a full material disclosure (FMD), Class D declarations report substances at the homogeneous material level. The product is broken into sub-products until the homogeneous material level is reached, then the substances are listed for the specific homogeneous material including substance name, substance mass or substance mass percent.

Company Contact: An official contact that acts as the point of communication within the company. This person can be contacted with questions about the request for declaration.

Company Unique ID: An assigned value for referring to the company that is not the company’s name (for example, a DUNS number).

Company Unique ID Authority: The regulating body that assigned the Unique ID (for example, Dun & Bradstreet).

Concentration: Concentration is calculated by weight over weight (w/w) and expressed as a percentage. 

Effective Date: The date in which the information provided in the declaration becomes effective.

Exemptions: Substances included in a Restricted or Declarable Substance list that are allowed to be included in a product under a specific set of conditions.

Full Material Disclosure: An FMD divulges every substance in the product down to the homogeneous level, including location, mass and/or PPM.  

Homogeneous Material: A homogeneous material is one material, of uniform composition throughout or a material consisting of a combination of materials, that cannot be disjointed or separated into different materials by mechanical actions such as unscrewing, cutting, crushing, grinding or abrasive processes.

Instances: The number of occurrences of the sub-product within the parent product or sub-product.

Instance Identity: Additional product or sub-product information (such as a SKU number, a lot code, a date code, etc.) associated with one particular product number only.

Instance Identity Authority: The entity that issued the Instance ID.

IPC-1752A: The materials declaration standard for companies in the supply chain to share information on materials in products. The standard is supported by an XML schema and a data model. 

Level: The level is based on the regulation as well as any additions the supplier or requester has made.

Manufacturing Site: Where the product or sub-product was made. The manufacturing site may also be where the product or sub-product was assembled.

Mass: The amount/weight of a substance, homogeneous material, etc., in the given product or sub-product.

Proprietary Data: Also known as a trade secret, proprietary data is information a company wishes to keep confidential.

Reportable Application: The intended use of a product for which a material/substance content declaration is required.

Response Date: The date of the supplier’s response to the request for information.

Sub-Product: A sub-product comprises any parts or sub-assemblies within the declared product that can nest within each other infinitely.

Substance Category: A high-level grouping of substances.

Threshold: The maximum acceptable level of a substance found within a product. Calculated by percentage of the product’s weight or by PPM.

Uncertainty Statement: A statement acknowledging the potential deviation within the declaration from the standard expectation.

Version: Are there other versions of the product or sub-product under different names?

Weightless Parts: The term used to define parts that have a value that can change depending on the size of the part. Parts can have:

  • A fixed chemical composition, but variable weight, and/or
  • A variable chemical composition, but a fixed weight, and/or
  • A variable chemical composition and variable weight

For example, resins, adhesives, cables or wires.


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