MIL-PRF-27404D
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein (except for related specification
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 chemical and physical properties of the propellant
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 a clear and colorless homogeneous liquid when
examined visually by transmitted light (a trace yellow/straw to green discoloration is allowed when
compared to a sample bottle containing purified water).
TABLE I. Chemical and physical properties.
Properties
Limits
Test Paragraph
Monomethylhydrazine (% by wt)
98.3
4.3.2
Water (% by wt)
1.5 max
4.3.2
Non-volatile residue (mg/L)
10 max
4.3.3
Particulate (mg/L)
10 max
4.3.4
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 bottle intended
for sampling shall be specially cleaned and handled according to the procedure described in ASTM
D2276 Section 10 with the exception listed 4.3.4d.
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