What does DNC mean?
| Meaning | Deuterium Isocyanide |
|---|---|
| Category | Science & engineering |
| Type | Symbol |
The formula DNC denotes Deuterium Isocyanide in molecular spectroscopy and astronomy. The Cologne Database for Molecular Spectroscopy identifies it under species tag 028508. Here DNC is a chemical formula label, not an acronym expanding into three ordinary words.
Preserve the letter order when copying a species label. The publisher’s Molecular Astrophysics index lists DNC as deuterium isocyanide and DCN separately as deuterium cyanide. Reordering the final two letters therefore changes the label rather than tidying its spelling. In our invented data-copying exercise, the source row is explicitly DNC but the transcription says DCN. Restore DNC and retain the source’s species tag so that the intended catalog entry can be found. A second exercise concerns the date on a database page. CDMS labels its DNC entry September 2009 and discusses earlier measurements and an earlier entry. That date identifies the catalog version described; it is not a claim that the molecule was first discovered in that month. The graphic and exercises below compare source labels and metadata only. They do not identify a spectral line, derive a molecular abundance or claim that an observation in a reader’s dataset matches this species. For a scientific comparison, keep the exact species, transition and source version with the measurement rather than treating three letters as the entire evidence.
Meaning in context
- DNC
- The CDMS formula label for deuterium isocyanide, species tag 028508.
- DNC and DCN
- The publisher’s index gives different names to these differently ordered labels.
Practical examples
Preserve the source label
- Before
Invented transcription exercise: source species DNC; copied row DCN. Draft: the letters were only reordered for neatness.
- After
Restore DNC to match the stated source species and retain its source identifier.
The publisher’s index distinguishes the two labels; their order is substantive.
Date the catalog record
- Before
CDMS record exercise: Date of Entry September 2009. Draft: this proves the molecule was first discovered that month.
- After
September 2009 dates the catalog entry described, not an established first discovery.
A database version date and a discovery date are different historical claims.
Original illustrative examples, not quotations or reports of actual events.
Read the species label
Am I copying the same species label, and what does the catalog’s date actually describe?
See all guidance
Copy a species
Retain the exact formula order and tag.
DNC, species tag 028508, identifies the cited entry.
Compare labels
Do not substitute DCN for DNC.
The publisher lists different names for the two labels.
Read a date
Preserve the metadata field name.
Date of Entry is a catalog-entry date.
Keep DNC and DCN in their documented order, retain the species tag and distinguish a catalog-entry date from a discovery claim.
Help improve this entry
Spot a mistake or have a clearer example? Suggest a change.
By AcronymIndex Editorial Team · Editorial policy