YELLOW RAIN-ANALYSIS EVALUATION OF TAN POWDER-YELLOW POWDER-LEAF SAMPLES -LEAVES-LIQUID-SOLID

• Document Type: FOIA
• Collection: FOIA Collection
• Document Number (FOIA) /ESDN (CREST): 00037486
• Release Decision: RIFPUB
• Original Classification: U
• Document Page Count: 12
• Document Creation Date: December 28, 2022
• Document Release Date: September 26, 2017
• Case Number: F-2012-01432
• Publication Date: July 23, 1984

Approved for Release: 2015/01/05 000037486
ANALYTICAL BRANCH
RESEARCH DIVISION
23 July 1984
Analysis/Evaluation of Tan Powder
A multiple sample shipment designated 10027A(5) was received by
the Analytical Branch from FSTC 3 March 1984. One sample, consisting of
a tan powder carrying the identification TH 840224-1DL, was designated
10027A(5)-18. The powder was containerized Ira glass screw top jar over-
packed in styrofoEm.
A vapor sample withdrawn from within the glass jar was subjected to
analysis by gas chromatography/mass spectrometry (GC/MS). Based on this
analysis, a thermal profile of the neat powder was determined by
differential thermal analysis (DTA) and thermal gravimetric analysis (TGA).
Methanol soluble materials were analyzed by ultraviolet sp3ctroscopy (UV).
Solvent insolubles were analyzed by infrared spectrometry (IR).
The GC/MS spectra of the vapors associated with the powder identified
the presence of o-chlorobenzaldehyde, CS, and chlorobenzylcyanide. The DTA
and TGA determined the melting point as 94�C and the boiling point as
311�C, with 1% water and 9% nonvolatiles. The melting and boiling points
agree with those of high purity CS. UV determined the CS to be 98% pure.
IR spectra identified the solvent insoluble materials to be a crystalline
silicate, identical with those found in the previously reported CS samples
TH 831205-1XX and TH 831205-2XX (10027V(4)-2,3). The silicate is not the
amorphous silica gel or Cab-O-Sil normally used in CS formulations.
Conclusion:
The sample consists of a CS formulation containing 9D% CS of 98% purity,
1% water, 9% crystalline silicon dioxide.
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ANALYTICAL RESEARCH DIVISION
RESEARCH DIRECTORATE
27 September 1984
Analysis/Evaluation of Yellow Powder
A multiple sample shipMent, designated 10027A(5), was received by
H840220-1E8,
the Analytical Research Division, 3 March 1984. from F5TC. One sample,
consisting of a yellow powder, carrying the identification T .0
was designated 10027A(5)-15. The sample reported] was scraped from
leaves and
A vapor sample withdrawn from within the paper enclosure was
analyzed by gas chromatography/mass spectrometry (GC/M5). A portion of
the powder was extracted with chloroform. Another portion of the powder
was extracted with 1:1 methanol:water. The solvent solubles were analyzed
by GC/MS, ion chromatography (IC), thin layer chromatography (TLC), and
infrared spectrometry (IR).
The GC/M5 spectra of the vapors associated with the powder identified
the presence of acetophenone, 2.6-di-t-butyl-4-formylphenol, and an
unidentified compound Ma 57, 82, 97, 123. The GC/MS spectra of the
chloroform solubles detected two high boiling aliphatic hydrocarbons,