Version 6.2

• enable giving translation keys per language (lang)
• re-write translations module giving keys per language rather than vice versa
• fix issue with phases/sub=true (issue #49)

Version 6.1

• extend syntax of `\state' command (thermodynamics)
• add reactants module to the errorcheck module
• fix bug in Danish translation
• rename module chemformula > formula
• put reactions in the chemfig method in between \schemestart and \schemestop (formula)
• replace deprecated \Lewis with \Charge in method chemfig (formula)
• choose the formula method if either mhchem or chemformula are loaded; choose chemformula if there is a conflict (formula)
• use last instead of first found method for defining floats (scheme)
• new option scheme/float-method (schemes)
• new option reactions/own-counter (reactions)
• new option reactions/autoref-name (reactions)
• deprecate option reactions/tocbasic (reactions)
• make \autoref work with reaction environments (reactions)
• fix support for cleveref and fancyref with reactions (reactions)
• reorganization of deprecation, removal, and patching
• rename nomenclature/format into nomenclature/latin-format (nomenclature)
• new option nomenclature/iupac-format (nomenclature)
• properly implement and document user modules (i.e., styles) as opposed to chemmacros' own modules; since v6 \ChemModule has a new function which is why \ChemStyle is introduced
• add load-time option stop which can prevent modules and styles from being loaded

Version 6.0

• merge modules into on file
• drop compatibility mode
• add reactants module, thanks to @Sonja-K
• fix issue #42
• use LaTeX's new hook mechanism
• get rid of scrlfile dependency
• update to l3text
• rename \Torr -> \torr
• new iupac command \normal
• resolve issue #45
• adapt to siunitx v3.0, implement units that have been removed from siunitx
• add Danish translations
• new translations module, move all translation declarations there

Version 5.11

• let \chemmacros_iupac:nn think we're in the document – fixes issue #30 (nomenclature)
• add option redox/format (redox)

Version 5.10

• define \torr as well as \Torr (units)
• prefer lazy boolean evaluation
• prefer the kernel commands to \chemmacros_leave_vmode: and \chemmacros_tex_if:

Version 5.9

• fix bug introduced in the last version
• correction: torr -> Torr (units)
• define latin phrases on the go instead of at begin document

Version 5.8e

Changes since v5.8a:

• fix missing hyperref check
• fix bug in \chemmacros_p:n (acid/base)
• smash sub- and superscripts of polymer delimiters (polymers)
• add some Norwegian translations (reactions, scheme)
• change O{} argument of reactions into !O{} (reactions)

v5.8a

• changes to compatibility test: it now works also for subreleases
• change behaviour of \ChemCompatibilityTo and \ChemCompatibilityBetween in order to cope with the changed compatibility test; adapt all files reflecting those changes
• change behaviour of \__chemmacros_break_point_insert:nnn so it does nothing when it is invoked by the last token in \iupac (nomenclature module)

v5.8

• new option nmr-base-format (spectroscopy module)
• change \hapto and \dento to follow iupacs rules according to IUPAC Red Book 2005. IR-10.2.5.2 The eta convention (p.216) and IR-9.2.4.2 The kappa convention (p.155f) (nomenclature module)
• fix error in \chemmacros_allow_hyphens: definition (nomenclature module)
• new options cip-inner-format, cip-outer-format and cip-number-format (nomenclature module)

v5.7

• \iupac gets an optional argument for setting options (nomenclature module)
• \latin always defined by chemmacros (nomenclature module)
• fix conflict with achemso (nomenclature module)
• allow chemscheme/chemstyle to be loaded after chemmacros (errorcheck module)
• translation keys get internal prefix (translations module)