Application guide / Version 1.0
A clean solvent is not a clean-hardware certificate
Keep the purchased material’s specification separate from the component’s cleanliness acceptance record.
Two objects, two evidence records
NASA JSC’s PRC-5001 Revision G describes hardware cleanliness in terms that can include particulate and nonvolatile residue criteria, with precision-cleaning verification beyond visual inspection. Its requirements have a defined program and process context; they are not a universal solvent specification.
The purchasing distinction is important: a chemical lot record describes the supplied material, while a hardware acceptance record addresses a component after the relevant process. Neither record should silently stand in for the other.
Ask for the method and the acceptance authority
Our proposed review captures the required property, method, units, limit and governing document revision in separate fields. If a request says only “low residue,” ask which object is being evaluated, how it is evaluated and who sets the limit.
A product’s advertised grade does not by itself demonstrate that a specific component meets a program cleanliness requirement. Request the exact chemical documents, then keep the component verification and process approval with the responsible engineering and quality team.
- Does the requirement apply to the liquid product, an extract or the hardware?
- Are particulate and residue requirements separately identified?
- Is the document revision the one required by the purchase order?
- What evidence must exist before the component can be released?
Requirement → evidence → decision boundary
An editorial checklist for your review—not a table of product specifications.
| Requirement | Evidence to request | What it does not establish |
|---|---|---|
| Supplied chemical | Exact specification, test methods and lot documentation | A chemical COA is not a hardware cleanliness certificate. |
| Processed component | Program-defined verification and traceable acceptance record | Visual appearance does not establish every required cleanliness metric. |
| Program approval | Governing revision, approved process and release authority | A public NASA document does not confer flight qualification. |
Make the open questions useful
Record requirements, evidence gaps and approval owners in a downloadable purchasing brief.
Open the requirements worksheet →Revision record
1.0 · September 10, 2026 — Initial source-based edition. No original testing or product qualification is claimed.
For commercial aerospace materials and purchasing reviews. No flight qualification, oxygen-service approval, propellant formulation or cleaning procedure is provided.
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