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All answers having "Chemical compound" as clue:

4 Character Answers:

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ACID

ALUM

AMIN

ARYL

AZIN

DIOL

ENOL

IMID

IMIN

OXID

SALT

UREA



5 Character Answers:

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ALDOL

AMIDE

AMINE

AZIDE

AZINE

DIENE

ESTER

IMIDE

IMINE

OLEIN

OSONE

OXIAE

OXIDE

OXIME

TOLAN



6 Character Answers:

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ALKALI

BORIDE

HALIDE

IODIDE

ISATIN

ISOMER

KETONE

TRIENE



7 Character Answers:

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AMIDINE

ANILINE

CAPRONE

METHIDE

MONACID

NITRIDE

POLYMER

SULFIDE

TRIACID



8 Character Answers:

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CHLORIDE

PENTAMER

SILICONE



9 Character Answers:

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HYDROXIDE