GERMANY (1928) Ammonia. Red meter cancelation on envelope: "Ammonialwerk Merseburg."
$10
GERMANY (1930) Chemical industry. Red meter cancel on envelope: "Chemische Fabrik in Billwarder".
$5
GERMANY (1947) Glycerin. Chemicals*. Red meter cancel on censored envelope. Otto Aldag. Ole u Fette Glycerin Chemikalien.
$10
GERMANY (1949) Chemical meeting*. Cancelation for Munchen Chemiker Tagung 1949.
$5
U.S.A. (1950) Noteclip*. Red meter cancellation on envelope Pitney Bowes No 158862:Stokolite Anti-Corrosive.
$10
U.S.A. (1951) Silicones. Red meter cancellation on piece Pitney Bowes No 81580: "GE, Silicones for Industry."
$10
GERMANY (1955) Chemical industry. Express envelope with cancelation of "Gesselschaft Deutscher Chemiker."
$8
BELGIUM (1955) Ernest Solvay*. Maximum card with First Day cancel. Scott No B573, Yvert No 973.
$4
FRANCE (1956) Sabatier*. Chemical apparatus*. Trial color proofr. Sabatier contributed much to the science of catalytic chemistry. Scott No 793, Yvert No 1058.
$15
FRANCE (1957) Thénard*. Trial color proof. Thénard invented Thénard blue, a pigment used in Sèvres and discovered the element boron. Scott No 864, Yvert No 1139.
$20
FRANCE (1963) Nicolas Vauquelin*. Trial color proof. Scott No B372, Yvert No 1373. Chemist who discovered beryllium and chromium.
$15
GERMANY (1964) Chemical plant. Registered envelope with cancelation of VEB Chemiwerk Kapen - Kapen bei Dessau - ZKD.
$5
CZECHOSLOVAKIA (1966) Model of molecule*. FDC to East Germany with thematic cancel. Czech Chemistry Society 100th anniversary. Scott No 1407.
$8
RUSSIA (1969) Dmitri Mendeleev*. Maximum card with thematic cancel. Scott No 3607, Yvert No 3451.
$10
FRANCE (1971) Grignard*. Nobel Prize*. Chemical apparatus*. Philatelic First Day document with special engraving thematically related to the stamp and printed description and explanation of the stamp on the reverse. Grignard won the Nobel Prize in Chemistry in 1912 for organic chemistry. Scott No B447, Yvert No 1669.
$10
AFARS & ISSAS (1972) Pasteur*. Crystals*. Glassware*. Calmette*. Guerin*. Caduceus*. Bacterial culture*. First Day Cover with cachet of busts. Scott Nos C70-1, Yvert No PA77-8. Chemists and bacteriologists, benefactors of mankind.]
$10
AFARS & ISSAS (1972) Calmette*. Guerin*. Caduceus*. Bacterial culture*. Imperforate. Scott No C70, Yvert No PA77. Chemists and bacteriologists, benefactors of mankind.
$5
GERMANY (1988) Leopold Gmelin*. MUSTER (Specimen) overprint. Scott No 1560, Yvert No 1209.
$15
NORTH KOREA (1998) Vinalon molecule*. Inventor*. Stamp + S/S overprinted SPECIMEN. KSC Nos 3866-7.
$10