MIL-PRF-27402D
sheets), the text of this document takes precedence. Nothing in this document, however, supersedes
applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Chemical and physical properties. The propellants, hydrazine conforming to
MIL-PRF-26536 and uns-dimethylhydrazine conforming to MIL-PRF-25604, shall be used in this
propellant mixture. The chemical and physical properties of the propellant mixture shall conform to those
listed in Table I when tested in accordance with the applicable test methods.
3.2 Limiting values. The following applies to all specified limits in this specification: For
purposes of determining conformance with these requirements, an observed value or a calculated value
shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification
limit according to the rounding-off method of ASTM Practice E29 Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with Specifications.
3.3 Filter. A filter with a rating of at least 10 micrometer (µm) nominal and 40 µm absolute rating
shall be installed between the manufacturer's plant system and the container to be filled for delivery.
3.4 Qualitative. The propellant shall be colorless, homogenous liquid when examined visually
by transmitted light.
TABLE I. Chemical and physical properties.
Properties
Limits
Test Paragraph
Hydrazine (% by weight)
51 ± 0.8 min
4.3.2
(1)
UDMH (% by weight)
47 min
4.3.2
Water (%t by weight)
1.8 max
4.3.2
Total hydrazine, UDMH, and amines
98.2 min
4.3.2
(% by weight)
Particulate (mg/L)
10 max
4.3.3
Note:
1
uns-dimethylhydrazine (UDMH)
4. VERIFICATION
4.1 Classification of inspections. The inspections shall be classified as quality conformance
inspections.
4.2 Quality conformance inspection. Unless otherwise specified (6.2), each filled shipping
container shall be considered a lot and shall be sampled. Each sample shall be subjected to the visual
examination described in 4.3.1 for conformance to 3.4 and to the tests specified in Table I.
4.2.1 Sample. A sample consists of not less than 600 milliliters (mL) of propellant. Unless
otherwise specified, quality conformance tests shall be made on the sample of propellant taken directly
from the shipping container. When required, the sample shall be forwarded to a laboratory designated by
the procuring activity for subjection to the quality conformance tests specified herein. The glass narrow
3
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